I was watching VCT then came across this thought. So in VCT your team can ban at least 1 map. You also get to pick your own. I think the banning goes first so your pick might be not be your best map. Unless the opponent bans their worst map...

Why is there a B backsite spawnpoint in Ascent? 80% of the time someone else spawns behind you by the time you reach stairs and the other 20% of the time you walk into a crossfire between B main, CT and market while being shot from the back...