I'll answer seriously:

Both are the same general development team.

FFXI doesn't need to undergo an overhaul of it's foundation.

FFXI is a 9 year old established and near it's end of life MMORPG.

FFXIV is having slow updates because attention is being focused on it's foundations more so than expanding. Nothing can be "quickly implemented" when you want to get out your main project as quick as possible, because then it's guaranteed it was thrown in just because with no testing. Which is why things like "Anima changes" won't happen till they finish up the main patch.