This is very simple, you can't change keeper rules for 2010 right now, except by unanimous vote. Even if there is only one guy holding out against changing, you can't do it. That guy might have made a decision last year to punt on 2009 and make trades to set himself up for 2010 - why is it OK for him to get screwed? Also, you'd have the opposite problem moving forward - why would any team who is out of it ever make a trade to improve his keepers if there's a chance the rules are going to change before next season? It is nonsensical.
I thought this was a VERY competitive league? How can anyone be at a huge advantage if you stick with 4 keepers?
"The government cannot give to anyone anything that it does not first take from someone else"