I've noticed I lose less perks. Before, when ENY was an issue, I'd only be shooting down 20eny planes, but now with everyone in a 5, its much easier to maintain perks while using expensive planes.
I havent noticed any difference in side sizes, last night when I checked we weren't larger than the other teams, it was just a 2v1 situation. We already had the number of Bish bases we needed, and with us focusing on Rooks, the Bish took it upon themselves to try to grab what they could from them too.