IMO, the real gameplay problem is the MegaHorde raid, which seems to be the current trend.
Instead of adjusting point or perks based on country numbers, adjust them based on the ratio of enemy/friendly planes in icon range. The MegaHorde Vultch would generate almost no points for the Horde, and lots of points for the few defenders.
It would also minimize the incentive for the CongaLine and GangBang attacks, and promote "fair" fights.
Of course, some players don't play for points.