I'm at level 3 at the moment, and it's by far the most active league so far. Only 1 bot and 10 or 11 of the other teams are very active and present at most of their games (well the times I've dropped in to look anyways).
Must say having most players in the league active and competitive has created a great league where I'm sure nothing will be decided until the final day.
Maybe the more active you are within the game gives you more chance of being placed with other active players .... if that's the case it's all good with me.