I have to come in on the side of leaving multipliers as they are. Last night was an rather exceptional - I have never encountered that sort of population imbalance before.
That said, it was fun as hell on voice chat yelling insanely to each other as we landed ridiculous perks. It was a rare situation that should remain a possibility, unlikely as it is. Also, keep in mind, we killed LA7s (5 ENY) in 109 G6s (40 ENY,) so we started with a rather hefty base perk value.