Why doesn't valve celebrate their custom games in their main event?

There are already 2 team brawlers, overthrow and coliseum. And some PvE maps like diretide, wraith night, year beast and now siltbreaker.They could easily make a mini tournament during the events with all stars who got eliminated from the main event play some best of 3s or 5s.Frankly i have never watched an allstars match at TI cause it is pretty boring. But a super compact and quick games like overthrow or coliseum might be magical. They could also release their new heroes because eventually the hero will have the 4(5) abilities in these game modes as well.These maps may require balancing, but hey it is not going to be an official match so having fun rather than a fair win wont be a flaw.This would also stimulate the dying arcade genre and garner incentive for map creators if valve in the future opt for the all stars to showcase a handpicked community created map on their dota engine.Its a win win IMO. via /r/DotA2 http://ift.tt/2r9NoNm