Maybe they'll add something more flashy than normal cannons, like fireworks. I was a little bummed that they ignored it with this patch, but the only mount animations are the standard ones that already had animations from quests. Hopefully they'll add something for all of the mounts, especially the subscriber bonus ones. Gilded Magitek shoots golden fireworks, Fat Chocobo does a ground pound, Behemoth shouts "GRRAAAAAAAAAAAAHHHHH".