I would like to see stiffer ENY restrictions, and allow people to change countries to the side with lowest numbers, without being restricted by the timer built in currently.
HiTech's posted the formula and exact numbers in the past, but Kev's description is close enough for the purposes of this discussion. It does work to some extent, since it offers some encourage in the way of perk multipliers and ENY restrictions, but I think there's still a little room for tweaking.
FWIW, last night was as bad as I've seen it in a few weeks. Granted, numbers were horribly skewed a while back, but the influx of newer players (who weren't much more than gun fodder for a bit) somewhat offset that imbalance. Despite logging on last night to find the rooks with nearly double the numbers the knits had, and the bish with 50 or 60 more players, within a few hours, the knits outnumbered the bish by a similar margin, and the rooks numbers had also dropped dramatically.
I don't know if that's due to sidebalancing or not, but it's nice to see the numbers reach some sort of balance, as opposed to facing a horde perpetually.