Hey, thanks for your comments, mate! I'll be giving your ranger another look over, and generally getting caught up on ENWorld, this week.
I'm really not convinced that the Veteran is necessary as a subclass...I mean, it is a beautifully constructed subclass, don't get me wrong. But seems a bit too "Any/Every Fighter can be this guy" to really justify itself. A Battlemaster can play the grizzled veteran...a Champion can play a weapon or warfare specialist...and/or/vice/versa. I think the premise of the subclass is more appropriate to the area of character background.
I totally get your point, but I have a different philosophy of design: Sub-classes should provide identity, not just mechanics.
Battlemaster and Champion tell us very little about the
identity of your fighter. Whereas a College of Valor bard or an Enchanter wizard says a lot about that character's identity. Actually, Mike Mearls in the latest Tome Show mentions that he regrets being too mechanics-focused in the fighter sub-class design, and not focused more on creating identity. I agree with that sentiment.
Another train of thought: Does a fighter with a Noble background (and maybe the Mounted Combat feat) totally cover a cavalier? Similarly, does a fighter with a Soldier background totally cover a grizzled veteran?
My answer to this is emphatically "no" because:
- The grizzled veteran archetype, like the cavalier archetype, has enough to it that there is plenty of design space to explore beyond a background (or feat). A cavalier is MORE than a fighter with the Noble background. Same is true for a grizzled veteran.
- Not every player of a fighter with the Soldier background wants to end up as a grizzled veteran. Sure, that's one direction they could take their character. But maybe they picture more of a mythic "chosen one" hero? Or maybe a wandering weapon master duelist who tries to put his military service behind him?
Slayer as well...any fighter of any subclass should be capable of being an effective monster-hunter. But, this is not quite so..."general", I suppose, as the Veteran concept.
It's actually a huge archetype when you look at video games and anime. Aesthetically, I like such things to stay at the periphery of my gaming, but I know there are lots of players that are fans. If they can get a monk based on the Last Airbender, they why not a fighter based on Monster Hunter (or insert a pop culture reference that I'm failing at, haha).
Does every fighter hunt a specific foe with single-minded focus? Does every fighter rely on terrifying their foes and hang trophies of fallen foes from their shield or saddle bags? Does every fighter have a unique magic weapon bonded to them to aid their hunt?
My answer was "no", making the Slayer a viable archetype (even if the name is not the greatest and it's a bit of a smorgasbord concept).
Cavalier and Warlord, of course, have legacy and/or popularity at their backs and are specific archetypes (given the differentiation made between a Battlemaster and Warlord), we haven't seen in the game yet.
I imagine my version of the Warlord/Marshal wouldn't make a 3.5e/4e player
totally happy, but it fits well thematically as a sub-class of fighter, there's limited healing ability, and overall I went for a more holistic approach encompassing many aspects of a "warlord" archetype.
The "Guardian", as the mythic "chosen one" hero, is a great concept also and one I've thought of doing myself, for those looking for the "Destined"/"Mythic"/Grecian demigod or Arthurian/Aragorn One who Would [or Shall] be King heroes type. Hadn't really decided on a name for it yet, but really like the concept. [As you know, "Guardian" is taken by a ranger subclass of mine. haha.

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Yeah, I can see why it wasn't made a sub-class...
any character could have "destined" in their backstory after all, and D&D translated Aragorn as the ranger class. But I think it fits fighter great and provides much-needed identity!