@sladow-noob @Xayo:
As an avid setoner I have been arguing for the removal of setons from the 4v4 pool since before tmm even went live, for those exact reasons!
If I want to play setons I can just do so, and if I want to play something fresh and queue up for the tmm, I don't want to randomly get thrown into an unbalanced setons that must devolve into cancer to be playable.
Making Setons the "map of the day" once every couple months or something, similar to mapgen week on ladder, may be a better solution.
Regardless, Setons shouldn't be in the default 4v4 map pool.