I think in FFXI gear swap is one of the core-fun feature of battle system. Having the chance to study different equip sets to maximize every ability or situation in real time is stimulating and brings a lot of variety into play even for a single job. Of course no one says this feature has to be carryed over to ffxiv as it is... I just ask, if it's possible to think of some other feature in battle system that could make a bit more spicy every fight by breaking the "ability cycling" and "fixed equip" walls.

Let the players think and invent new things and ways to play even beyond the devs plans, make a battle system full of open chances for adventurers so they can reinvent each fight in real time!