PoE is more wizard centric than any IE game ever was.
Developer(s) found one mechanic to rule them all (similar to cooldowns in other modern RPGs) that is good enough at applying spell effects, and used it to apply all other effects in the game, by using same resource mechanic for everyone too.
That level of uniformity is not terrible for pnp games where you need to play fast and all you can do is roll dice, but in a computer game that means that yes, classes mechanically behave the same.
Uh right. You actually played Eternity at some point? You realize it is perfectly viable to beat it with no wizard at all? Good luck beating BG2 on any real difficulty level without a wizard. But Eternity, way more wizard focused. Yeah.
Its actually not difficult at all. Its not uncommon for me to avoid taking a wizard altogether. Why? DRUIDS. I have never seen a wizard able to defend against Insect Plague. No save, splits to multiple enemies, no protections block it, shuts down spellcasting altogether. MUCH easier than any wizard duel. Alternatively, an Inquisiter Paladin, or Wizard Slayer fighter, or Bard (That high level dispel magic). Hilariously wizards/sorcerors are only like, the 5th best class to beat another wizard.What you wrote was so hard to read and get through for multiple reasons...but let me just say this-
In no way whatsoever, do you face so many druids in BG2 that excluding a wizard in your party is an optimized or reasonable decision. It's just being a contrarian, esp when you bring up Wizard Slayers, easily considered the worst class in the game. Wizards DO in fact have counters to Insect Plague sound as reflection. Next you're going to tell us Staff of the Magi or Staff of the Ram are overrated.