I played in an all bot league last season, until game 6. Suddenly, the entire league filled with humans. Granted, half of them made their teams and never logged in again and thus turned bot again six weeks later, but then they, too, were converted back into human managed teams. There were a few weeks where the only players with enough games to be eligible for the leader board were mine. That was an interesting sight to see.
Needless to say, it is quite easy to train out of position and not worry about losing in a league full of bots. Enjoy that part while you can, even though it's not as challenging or as much fun as playing other people.