My (largely irrelevant) opinions:
Fuel burn rate of 2.0: not in favor, unless maps (like BoB) are actually half scale. Want the option to be able to do historical like things.
Name: how about "Historical Arena", HA, since historical matchups is the whole point.
Reasons I don't go to AvA more often:
1) Attitude. Seems I get belittled for anything I do that doesn't lead to my immediate death. (Examples: fly high, extend when outnumbered or outflown, actually enter a fight etc.) AvA is apparently an exclusive club and outsiders are unwelcome.
2) My time in AvA is limited by its very raison d'etre, i.e. limited planesets. There are tons of planes I don't want to fly. I think AvA will always have far fewer people for this natural reason.
3) Chicken and egg. There aren't many people in AvA because when they log on they see there aren't many people in AvA
It might help if the logon screen had some kind of tagline for AvA, i.e. "Historical (Battle of Britain) 37/200 47", as an advertisement. Or maybe the logon screen should just lie about the number of people in AvA
"Historical (Battle of Britain) 199/200 12".
4) I stink. AvA draws the best players. If I fly there... I die often. No matter what anyone says, that isn't much fun. It is especially unpleasant if those good players are also obnoxious and taunting. (Translation: "Momma the mean man hurt me! Momma: Then don't go there.")