so you're making a comparison to the situation with the warlord... but not making it equivalent .
I know, it's totally unfair, let's go back and
make it equivalent:
Try this. The next time you want to play a caster, you can't. You are not allowed to.
Whoa! Wait, first of all, the Warlord is just one class. OK? There's three other mostly-martial classes! Of course, they're all DPR heavy. Are there any DPR-heavy full casters with just not much flexibility outside of that? Oh, well, /no/. Hmm... That make equivalency terribly difficulty. To get equivalency with "there are no caters" we'd have to look not, just relative to the Warlord, but relative to all missing 'martial' options from both 3.x & 4e, and, we'll have to paint a /very/ different hypothetical picture of D&D, more nuanced than just 'no casters.'
Let's get started:
Ok, first off, there are no classes that get traditional vancian magic, none, there are a bunch of martial classes, mind you, who do all kinds of crazy things with maneuvers and martial practices and whatnot (that's to correspond to all the full- and half-caster classes), there's one class that isn't /technically/ martial but is still strictly non-magical (that's to correspond to the Monk, heck, it can be the Monk, even, though maybe a western monk, just to be cute, since it's only a hypothetical, why not?). Those classes are all hard-out as caster components. There's, le'see, 3 classes, with 5 sub-classes among them that are arguably casters, actually using magic. 4 of them don't actually cast spells, one them throws blasts of magical power around, eventually several of them per round, that do a lot of damage (not as much damage as some of the high-level martial maneuvers, though), one of them channels a deep well of mystical power and throws one big blast every round, but burns himself out after a couple/few times a day, one of them throws a particularly lethal death-spell, but only at especially-vulnerable targets.
You can only play a half caster. After all, an Eldritch Knight or a Ranger should be good enough right? You get to cast spells. Full casters are just the munchkin option anyway. Only power gamers choose to play full casters. Real role players certainly don't.
No! No! No, bad Hussar! Bad! Bad! Give your wings back to the quartermaster!
Equivalency, we must have equivalency. /Half/-caster? You should be so lucky! no, no half-caster-soup for you...
But, wait, all is not lost: one of the 3 rapid-blaster-class's sub-classes actually casts spells. It gets four 1st level slots at third level, and eventually 6 total; it can use them to cast 1st level spells, and can know 3 first level spells from a list of 16, gaining more over time until, at terribly high level, it can know 9 different 1st level spells, and cast six times, in any combination.
As they said in Bored of the Rings, when Goodgulf lit their campfire with a zippo lighter:
"Such magic!"
There is one catch, only a few of them are recognizable spells from past editions of D&D, the others are just minor variations on blasting things, which that class already does pretty darn well. Icing on the cake kinda stuff.
Sucks wouldn't it? Being told that over and over and over again every time you even mention the idea of playing what you want to play? Never minding that you're being told this by people whose only real objection is that they don't want what you want and will do everything in their power to deny you the opportunity.
Yeah, OK, might suck a teeny little bit. But at least we have a start on equivalency... and they're could be mitigating factors, even so.
Such as:
Do I get to homebrew my own caster
YES! Problem solved!!!!
Of course, even though the fast-blaster-caster-type-II - let's call him the Magicmaster - has spell slots, and has a list of 16 whole spells, and even 3 of them that are clearly recognizable classic spells, that still leaves you a hundred plus spells short of a full deck of spell cards, and, ah, well, the mechanics are more than a little different from what they've ever been before, and you can't just graft-on the old spells just as they were in some past edition, so...
...yeah, be ready to write a lot of spells, not just a quick class outline....
But, hey, if you have the fortitude to do all that design work, you'll have exactly the caster you want!
Well... um... sure, yeah, some DM, somewhere, might let you bring in whatever it is you come up with. He might be worried it's some kind of overpowered Mary Sue - and if he's not, you might be worried about what kind of DM he is... but...
...yes. In theory. Possibly before the next ice age, certainly before the heat death of the universe, anyway.
Are there third party options for casters
Yes! PROBLEM SOLVED!!!!!!
Wow, to think, we were worried! In fact, there's a dozen of them. They're burried in that pile of stuff called DM's guild. When you dig into them, you find that they're mostly modest re-writes of the Magicmaster. A few have promise, but they're rather rough designs, and none actually bring back anything near the full glory of traditional D&D spellcasting.
I can play in this hypothetical scenario?
Ahh..... sure, hypothetically, a DM only slighlty less loopy than the one who might let you play some Mary Sue Uberclass might conceivably let you play one. I mean, it won't be anyone here, or anyone at AL, but, y'know, before global warming melts the ice caps, quite probably - way before the next ice age, anyway.
But, y'know, after a year or so of languishing in that hypothetical hell-hole, there's a hypothetical ray of hope. Yes, a hypothetical book (hypo-... I'm sorry, folks, the bits in my computer refuse to spell out hyyp h-
that word anymore) comes out with some more crunch!
Yay!
It's called SCRAG, and along with a bunch more martial options, one of which, the Bladedancer, can do a one-two blast kinda like the fast-blaster-caster, it has a few actually-mostly magical one. One of them, a sub-class of the deadly-blaster-caster, the mastermagician, can use 5 spell-like abilities gained over 17 levels, the other, the Purple Dragon Blaster ("Mr Purple Dragon Blaster, what's your line?" "It's blast'n purple dragons and it sure is fine!") is a fast-blaster-caster sub-class who gains two new spell-like abilities, two ally-affecting riders to the fast-caster-blaster's two spell-like abilities (which, more vaguely resemble two classic spells that the magicmaster already gets less vague versions of), and as a capstone, gets an upgrade to one of those two riders.
WOW!
Need I quote Bored of the Rings again, or is that an embarrassment of riches?
There, equivalency achieved.