Never, ever drop a player of the caliber of those guys to pick up what you suggested. Take the loss, even if you are on a downward spiral. Cutting those guys will do two things:
1.) weaken the heck out of your team for any week afterward
2.) strengthen someone else's team.
Either way, that strategy would come back to bite you. And picking up those other guys is no guarantee of a win, either. So, you would conceivably lose the game AND the players.