The votescramble command is amazing and allows for a great degree of variability, the only places the command falls short is the fact it will not adjust teams accordingly, and the fact that it kills off one of the more important features of the game, the ability to play with your friends.

On the issue, I'll not take sides, but I will say that I agree with Spiffy on the fact that switching the top player is typically not the best choice. I try to either switch myself or 2-3 of the regulars around in any effort to shift around teams. My reasonings are this
1) You never know who might be playing with a friend, or teaching a friend.
2) Switching the top player won't do much, unless both teams are terrible. It's never the work of one individual, but a group of skilled players working together. Much like a scrim, score doesn't mean jack, it's the successful push of certain players that allows for the gappage in their defense.
3) If a player shows a preference to a certain team, I usually won't switch em back, because they either want to play on that team because it allows them to have fun, or they have friends on that team they want to play with.