I was able to get from league 4 to 2, but the other players in league 2 have 3 to 4 times the health as me and mostly mythic cards. Seems like huge jump in difficulty from league 3 to 2. I'm level 38 with almost 800k health.
Me too! It's ridiculous!! I won every game in league 4 (+36), only lost two in league 3(+46,-2), then have only won 3 out of 30 in league 2. Players generally have a minimum of 2.5M and 5 mythics, and hit first, giving you zero chance of winning. I'd hate to think what League 1 (DL) is like now!!