PoE 2 has overdesigned inter-class combos that have no emergent potential for cross-class gameplay
I really love the combat system from PoE2, the limited drops and even the slower speed.
But one thing that makes me turn it off every time is the fact that outside of maybe a few exceptions, the skills feel like they have absolutely no potential to be mixed between classes and were hand tailored to work in a very specific way.
For example, monk makes use of power charges, but no other class does maybe except for witch on zombies. Nothing on the passive tree either, everything is specifically intended for monk or another class using monk skills only. No other skill will benefit from them outside of like 2 support gems.
Another example - remnants. They are intended to be used only on sorceress skills, even though many more classes have elemental powers. And not only that, many skills that consume remnants only consume very specific type. You either learn to follow exactly the same combo the developers designed for you or you will be stuck spamming one skill because nothing will synergize.
Compare this to PoE1 where you could pick literally any weapon, use it with spectral throw, spawn minions on hit, elemental ailments, bleeds, turn it into a mine generating machine with detonate, spread curse contagion with arcing effects, you name it.
And before you start spamming me with some endgame weapon swapping builds - sure, it is probably possible, but to me the fun in PoE1 was that I could pick anything I want and make it work for some time. Maybe it would turn out to be bad in the long run, but the build was mine from the start. In PoE2 it is reversed, I am forced to run on a slighly expanding treadmill and maybe just maybe make something fun later. That to me is the core problem with this game.