quit the league, they're bums. you don't change rules midseason.... ever.
What was the deal btw?
If it's a partial keeper league with a snake draft, having the first pick isn't a huge advantage because everybody else picks twice before you get your 2nd pick. Seriously, if the top players are already locked up as keepers, does having picks 1 and 24 really give a big advantage over the league champ who' s got picks 12 and 13?
There's nothing wrong with a fire sale to improve your keeper roster if you're out of it, though informally, when a player decides he's not going to win and is focussed on improving his keeper list, he announces it on the boards, and the offers come rolling in from whoever is interested, and the firesaler can offer deals too. To not announce it and to do a trade quietly, especially if you and he are best friends or something, well, it kind of looks bad. but changing rules in midseason is never acceptable.
It would never happen in my league anyway, but our league actually has a Constitution about how the league is run. In our 12 team league, to change anything, it requires a 10 to 12 majority vote, although so far, informally, in every new rule change idea, if the vote wasn't going to be unanimous, we never voted. There's just sort of an informal Gentleman's agreement we've had since the league is running along smoothly as is, and we don't want to change anything that upsets even one owner.
But if a change is made, and this is key, it doesn't take affect until the next season. This last off season, we changed the keeper rules to benefit the lower-ranked teams a bit, but it doesn't go into affect until this upcoming offseason. Our problem was, there are 10 very good fantasy baseball managers in our league and two guys (who are great guys) but the just suck at FB. And it's getting worse, because each year, they make horrible trades, stupid drops, and now, their potential keepers are with 1 or 2 exceptions, guys we wouldn't even consider keeping, so next year, starting from bottom to first, all the players not announced as keepers go into a pool, and we have a 2 round "keeper upgrade" draft, that you can either switch out a keeper each round, or you can pass and not draft... It was basically done so that, every year, no matter how bad they managed their roster, they can crawl back up a little closer to parity each year, at least before they start making dumb moves again.