I think bg3 was partly so successful because it has the illusion of depth. It feels like you have all these mechanical choices and your character is really yours, but because of how the math works out it's hard to make a character that's remarkably weaker or stronger than the average. Gone are the days of 3e feat chains and prestige classes. Or wacky dual classing.
That's always the risk with this kind of game. If you make it so players have a lot of freedom to build, some players will end up dramatically more powerful. And then the other players either hit a wall, or end up following guides. That's not fun.
I did get to end game path of exile 2 just by picking what looked good, but most people will recommend following a guide.
Maybe you can build around it by funneling the obsessive players into Maps in poe.