Note what HTC said: since the ENY came in, the oscillations in numbers happen faster, meaning that the overall imbalance remains for a shorter period before evening itself out. That matches what I've seen before and after the ENY came in.
Even since the ENY, the high side has swung from one chess piece to another. The rooks were high when ENY came, and the hordes were the worst I've seen Sunday after Sunday. (Newer folks may not realize that sunday evenings EST have been chock-full-o'rooks for literally years, probably due to squad nites and average age factors. Don't use Sunday pm's to make overall generalizations!) The Nits and the Bish have ahd their days in the numerical sun, and now its the rooks again, at least on Sunday Pms. However, those proportions are not fixed: at some hours even now, I've seen Bish grossly outnumbering all comers.
Hang in, and the Sine wave will return to baseline!
BTW, I think the big numbers happen less because of perk-chasing side jumpers and more because the disadvantaged log off in frustration....so before proposing a fix, make sure you've correctly identified the problem!!