Classes were a superficial problem.
The actual problem is the linear fighter/quadratic wizard mentality and how people tried to put characters who can wield obvious magic into a party with characters that resemble real-life warriors and trying to force the latter to be "realistic" despite them being obviously superhuman.
Chucking fireballs at people is totally fine if you're a wizard, but god forbid
you do it using martial skill. That's unbalanced weeb shit, unlike wild shape and Natural Spell
[1]. But until you show me how non-casters get equivalents to
shield,
true strike,
scorching ray,
invisibility,
wind wall, and
haste, I'm gonna say you're missing the forest for the trees
[2].
People talk about Gandalf and Aragorn, but Gandalf isn't a PC, or even properly analogous to any class (druid gets closest, but really he'd just be something like a
solar).
Pathfinder would probably get a lot less shit for keeping so many of 3.5e's flaws if they hadn't tried to hype it up as "3.5e, but balanced" while maintaining so much of the hilariously imbalanced magic from 3.5e.
[1] For clarity, I do not attribute this position to Arawn_Emrys. This is a generic claim/counter-point that was made about Tome of Battle during the years of 4e, and an example of the core imbalance of every edition of D&D but 4e.
[2] This part is definitely saying I think Arawn_Emrys is missing the core imbalance because of a superficial improvement to mechanics.