I don't understand how any of these things are bad. Legendaries and Megas/Z-moves are horribly unbalanced. Honestly, i'm glad they are gone. That means people will use other Pokemon instead of all 4 Tapus, an Ultra Beast, and the obligatory Mega. Also, I don't see how a temporary 3 turn power boost that any Pokemon can use is even close to how broken a permanent one that belongs to only a select few or a one shot move that can come out of nowhere.