Why on earth would anyone want more trash in dungeons? They only serve to waste your time and damage your gear (fighting three full trash packs damages your gear faster than dying three times in a row). There's zero reason to fight an enemy that isn't blocking the way or isn't required to progress on to the boss. If SE did something about the rate for gear decay and made killing trash more lucrative asking for more of it might be worth it, but I can't fathom why anyone would want more pointless obstacles right now.