I know I know, I'm not, nor I was regular, but here's my take.
1.) Arrange with HTC to disable scoring, including the stats if necessary.
2.) Limit the plane set to 2-3 max per side. History does not make great gameplay (you can still have historical 'specials' every once in a while).
3.) Make clear that teamwork is fine, but care needs to be taken to balance the sides and fights. 2-3 vs 1, ok, anything more is sort of excessive.
4.) Make AvA staffers be present more often and repeat to new players (and vets) as often as necessary what is expected from players.
5.) Have good fights...