I kinda disagree, see to me 4E went too far. Not with PC choices and not with monster roles etc (even though most of those cases existed/exist in all additions).
The problem for the PCs was everyone can now do everything all the time! To me, that just was NOT fun. I liked earlier editions' powers/abilities that specialised vs certain creatures, and I certainly lked that all your powers did not work equally against all enemies (barring 1-3 defense differences here and there).
You 'can' defeat fire creatures with fire? You can just keep hacking away at bags of hps like undead, iron golems etc no matter what you brought to the fight. To me (us - our group) that was NOT fun.
And yeah, monsters had roles (as if they never did), but basing all stats purely on level also diminished inginuity in a fight. No longer were people thinking, 'How can we take advantage of this slow, dim-witted, lumbering ogre?' You just used your best powers (same as the last fight whatever that was against). At best you might select powers tarketing Will and Ref, but even the monster stats don't help much there. The ogre was okay in those too, simply b.c of level?
I am liking some of the choices PCs are getting so far and the idea of the OP, but there should be some situations where you simply had the best combination to win the day...and others where it is a real struggle to be effective without thinking outside the square, running away, planning ahead, etc.
Well most fire-based creatures have Resist 10 or so, meaning I wonder if you've ever tried to defeat a fire-based creature with fire. Most of your at-wills do on the order of 1-4 damage, and even daily powers are hugely nerfed. Meanwhile ongoing damage riders might as well not even exist. Seen an Abyssal Pact Warlock against fire-resist creatures, it's not that funny.
I mean sure, you can SAY that they'll go down eventually to fire, but you're basically upgrading standard monsters to elites, and elites to solos by attempting it.
But I think we're simply hitting an edition barrier. 3E was rocket tag. Bring the wrong flavor of rockets to the fight and you were doomed. 4E is tactical combat. Bring the wrong flavor of rocket, and good tactics still carry the day.
The fact is, it sounds like you enjoy the research and the planning. Once you've researched and planned, it's okay if the fight is a foregone conclusion, since you're not interested in it. And 4E, with its focus on tactical combat and situational awareness is the exact opposite of that.
Actually I'd highly recommend you check out a narrative-based system like FATE or even Mage. You'd probably really enjoy that style of gaming.