Well, for this you just need to play and you'll have an edge. Its small and faster pasted than say, Nucleus or Lumberyard or Ravine, and increase the "fun" of the map.
From what I've been told, people enjoy this map over other arena maps. Not sure why, but they just do.
Yes, but then Valve is like, "Hey Frozen, we'll buy your arena_backlot but will you please change it to koth_backlot?" and mess it all up. I am sure there will come a time when The Aslym can crown his spiritual successor.