It's not blind guessing, Have you ever watched Earthworm's battles? You think he's blind guessing. You know how to win before play lol?
OK, have you ever seen earthworm double switch? With team preview, i can do it lol. I don't need to prepare for any trap, Wobb has his special ability, let him use it, that why he was Uber.
And the games will be at a higher level without it because you don't know anything, you have to scout, have to switch and have to think more. Some People said that it needs more skills than before, i don't think so. An Easy Example, You have a free turn on Gyarados, Switch-in Scarf Close Combat Infernape for example, normally, I'll set up Dragon Dance immediately, but i know he/she has Rotom-w from the start so i just switch away for advantage. Well, that's too easy.
And I hate waiting for some timid players, some spend 2 min "reading" my team...