Skill still plays a factor and the ones winning at the top are very skillful in this game so they have a chance in any league. The advantage still goes towards to the player who plays the most in each individual league as they are more familiar with its game play.

run tournaments at the same times

I have brought that up multiple times and it has multiple benefits. Currently the game lobby is seriously lacking in the games department. So much more can be done. Sometimes there are no official games for an 8 hour period which is not good for mass adaption.