Normal Matchmaking is a Nightmare Right now.
Normal is a nightmare to play in because of how unbalanced matchmaking is, and it is because MMR is not shared between ranked and normal. Usually its not a problem, but this preseason its been horrible and the disparity between players is staggering. I myself am a silver 4 scrub and have routinely been matched against gold, plat and the occasional diamond player. I have a couple of friends who are new to the game and they are also getting matched against those same mid/high elo players, which seems ridiculous when they are in the 20's level wise.
I think there should be some sort of MMR/ELO protection in Normal so you aren't always getting slaughtered by players that are 5-15 divisions better than you on the ranked ladder, especially if you haven't even hit 30.