Like the poster from the previous page, I also recently returned to WoW, but unlike them I think the talent trees are awesome, and when I read guides for the various classes I'm playing they pretty much all seem to have a niche or situational use that ISN'T just relegated to PVP (looking at you, One Ilm Punch/Feint/Hyoton/etc). I'll be the first to admit though, a lot of it comes from WoW's different approach to encounter design, where CCing or rooting or interrupting a mob at key points is crucial to your group's survival (a whole tier of talents is dedicated to CC, even!).

That said, things like Soul Effigy, Cloudburst Totem, Lifebloom on Resto Druid (not a talent, but still a really unique ability)...I think moves like that are what makes the game more interesting for me currently than FFXIV. More class complexity, whether it's through talents or a re-working of skills and encounter design, would make me really happy, but the I don't think the devs are going to risk alienating a huge swathe of their playerbase by making the game more choice-oriented and in-depth.