Meh, Exceeds i think are just the creators thinking we need another game-breaking set of cards. Lolno thanks. Some of the other cards in this site look/sound good.
Xyz aren't broken. In fact they were pretty much complained about for not being good enough, compared to the first Synchros. Then again, they're supposed to be splashable and useable in every deck, right? Why should they be overpowered?
Then Rescue Rabbit was announced and it messed all of that up.
No doubt Rescue Rabbit is good but worth putting Vanillas in your deck?
No thanks. Some decks already use Vanillas and in those it could be good (like water synchro, Genex Controller).
You put Vanillas in your deck when they're Water-Type Dinosaurs that can make a Shi En-like Exceed constantly, and contribute towards making a pair of Hyper Librarians for a Quasar play.
Also when they are Genex Controllers, let you loop Rescue Rabbit non-stop, and contribute towards synergy with Undine and Fishborg.