Now that there is a larger playerbase and leagues can be held every 5 hours rather than every 10 hours, there's double chances for people to get adjusted to, used to and play new leagues, but leagues still rotate in a cluster of four once per month, meaning the same rotations also grows old faster. I cannot speak for other people, but even though I am fond of the current rotation of leagues it's starting to feel rather old at this point, QD leagues aside. I think that a bimonthly rotation would bring more freshness to the (pre)constructed leagues while still allowing the same level of consideration for adjusting to leagues that the old schedule did.
I see your point, but I'd have to disagree, they may get old to those who manage to sign up for all/most of the games, but that's not the whole playerbase, I think ? I for one, given my standard 8 hours workday monday to friday plus saturday morning, I more or less can play usually just two leagues per day: one at lunch break and one in the evening. When i get lucky I manage to squeeze in a third one by signing in late afternoon shift and then playing in the last 30 minutes or so of the play time once I get home. Just as often as I manage to play 3 I have to skip either the lunch break one or the evening one because the time just don't synch with my schedules. Given all that, I manage to play one specific kind of queue maybe once every three days ? If the rotation was biweekly ( bimonthly means every 2 months as far as I know and by your post I think you want them to change more often, not less often) I'd play each map what, maybe 3 times? definetively not enough for me to get tired of them . Counterproposal : a change of league every 2 and an half hour (2 hours of signin/playtime, half an hour of pause), higher cost of signing in OR lowered cost but also lowered rewards (I'm thinking 1 gold chest -2gold chest -3 gold chest - 1 epic chest - 1epic 1 gold chest), but with a bigger league pool ( idk, 8? 12? all of them?)
Confusingly, it means both. "Twice a month or every two months" http://www.oxforddictionaries.com/definition/english/bimonthly