As long as the crossovers make at least a little sense and all rewards that can be acquired from the crossover events can be acquired elsewhere in the future, I'm 100% okay with it.

I still think the Bohemian gear, Guardian Corps gear, the FFXIII weapons, the Lightning/Snow hairstyles, the Shantotto minion, the Wind-up Brickman minion, the Thug's Mug, and the King Slime hat should be added to the cash shop.

More specifically, I would like crossover events for:

Type-0 HD
FFXV
Dissidia Final Fantasy (If/when it hits the PS4)
Star Ocean 5
FFXII HD Remaster