I am looking at it from a team/group perspective I believe. Again, if the conditions which encourage the switch in the first place (reduced numbers on one team), then exist again in an hour on the team 2 where the player switch to, why is he then prevented from accepting that "encouragement (eny)" a second time? Are the conditions not the same as when he switched the first time?
This is specificallly what makes people log off IMO - they can switch to take advantage of ENY or finding a fight once, but then they are stuck there for the rest of the playing session, and when the same conditions that existed before exist, they can't react to them.
I also realize this always bakes down to "the numbers", which players don't have access to, and probably wouldn't understand even if we did. It is what it is, obviously it isn't going to change at this point, but the reality is players DO log off after they've switched, and can't switch again, dozens have said so. Maybe they aren't in the majority, but it is a fairly common frustration to those looking for fights, not a "team".