The difficulty of normal content is great as is. Do not revert them.

[Jinglypockets]

I also said most people will just look up optimal solutions.
I don't feel it would make any difference on my enjoyment on ffxiv if they implemented this either.

I agree -- not in the way most people think about it, at least.

The benefits of talent trees are:

-Giving SE more flexibility to add new, fun things to the jobs without contributing to button bloat.
-Keeping the playstyle of each spec feeling fresh, even if every player is a meta slave; when the meta shifts, it forces people to adapt to the new builds and the playstyles associated with those builds, which keeps things fresh.

I don't know that either of those things are worth the opportunity cost or balance problems caused by talent trees.

Concerning looking to other games, I have nothing against that. ARR is basically yoshi p sending all his staff to play wow so they understand how modern MMO's work lol.
But there's also reasons why we play FFXIV in particular and not other games. (not saying no one that plays FFXIV plays other MMO's with this lol, before someone calls it out)
The ultimate end of "We should take things from other MMO's" is all MMO's being the same.
So perhaps best to be careful with this.

I've gone back and forth between FFXIV and WoW quite a bit. I like FFXIV better overall, but every time I switch I find myself saying, "Why can't I just combine the best parts of both games?"

WoW has Mythic+, more varied class design with less homogenization and more utility, and more varied encounter design that benefits from that utility.
FFXIV has everything else. If you could add those three things to FFXIV, FFXIV would be perfect.

Oh, and WoW's responsiveness, which, thanks to the busted engine, I unfortunately don't see FFXIV ever being able to replicate even if they tried.

For me, talent trees are very, very low on the list of things to steal from other games.