#4 is an absolute non-starter for me. I desperately wish for Square (or any MMO maker, really) to push down the level where the core single target and aoe rotations are complete. It's bad enough that the level cap skill tends to be what makes a rotation work. I've played far too many MMOs where the set bonuses fundamentally changed a rotation. Maybe you like to play guess the rotation, but that's not something I find fun in the least.