There's literally nothing wrong with this crossover event a lot of the complaints I'm seeing here come from people who either don't know what it it is or people that say it looks out of place and doesn't fit.
For the 5 people who have actually played a FF that isn't XIV have you looked at the random enemies in Eorzea lately? they look pretty familiar don't they? Yes, let's complain about things looking out of place and not fitting when we have these guys running around in T4 and Azys La (spelling?)
Why these two enemies in particular? Because they're strongly ingrained in XIII's lore and are a pretty big deal in the datalogs they have no place in XIV's universe, the yokai watch stuff is harmless and is just for fun any complaints about lore and stuff not fitting should be thrown at the window because XIV obviously didn't care from day 1 when they blatantly recycle enemies from any FF game with walking animations to save on cost.
Maybe I'm biased because I love Yokai-watch but I think people really need to learn to have fun with crossover stuff, Phantasy Star Online 2 gets this stuff all the time with Sonic the Hedgehog and Hatsune Miku but no one on JP forums or English people get this salty over it. I hope it gets more people into Yokai Watch, criminally underrated in the west and it's mostly from Americans "not getting it"...hmm kinda reminds me why XIV localization team made some changes to XIV but I digress.