With the addition of new abilities in Heavensward, some jobs (particularly pet jobs) are starting to hurt for space on action bars/cross-hotbars. One thing that would probably alleviate some of this would be having an automatic hotbar swap for particular stances (like Cleric Stance) and also based on summoned pets. It wouldn't completely alleviate the issue, but it would provide some relief for SCH and SMN especially. Tanks also would benefit, since they stance dance quite a bit, as would BRD and MCH, since they have skills only usable while under Gauss Barrel and Minuet.