Maybe a different approach to the aVA arena would work?? Change the name to Main arena Historical and Main arena Melee would still be available. Historical is small maps, two sides, same perks and scoring as Melee, maps rotate as won. Base take order is implimented into historical, focusing a smaller population into a coordinated fight.
I also think a two sided melee with ENY would work best, but ive seen the same answer from HTC enough to keep pissing into that wind.