I have a suggestion for the combat system. I was a Blade and Soul player and I have to say, the way the combat works is the best I've seen so far.
I don't know if the developers could make it to an option to implement a non tab-targeting system for players that would like it.
The camera would move with your mouse without pressing any buttons and targets are selected by looking at them. For certain bosses you could simply switch to the normal system I guess. And for enemy groups you wouldn't have to bother selecting a traget every time because it would do so automatically - which annoys me because every time a mob dies you have to select a new one and sometimes your tab is selecting targets that aren't even in the group in front of you and then you pull more mobs by accident that stand further away - is that just me or?
There are many MMORPG's out there that share a non tab-targeting combat - which I find good.
I personally was never a fan of tab-targeting but FFXIV is fun to play, so I'll keep playing it.