I agree.

One of the better things GW2 did was limit the amount of abilities you actually used in combat.
While I don't want to see FFXIV stripped down to such levels, I do believe that some ability culling(by introducing superior alternatives, cutting underwhelming ones) is in order for the next expansion.
I actually feel like they could do that already, like redesigning Ruin III to be a proper replacement to Ruin (1).

Just freeing up a few slots for every class/job like that will go a long way in preventing skill bloat.