I'd rather they didn't trade Papelbon right before his contract season. Given his personality and his lust for that big market setting deal, I think we will see a motivated Papelbon this season. 2006-2007 version more then the 2009-2010.
He's seemed less intensive and more cautious over the last couple years. I think it has a lot to do with him wanting to reach Free Agency healthy. I think he realizes that if he wants to set the market, he won't be doing it in Boston. And if Boston isn't going to pay him that record deal why put himself at risk? He's pretty much floated by on FB's the last two years. pretty much ignored his secondary pitches, A.K.A. the pitches that put the most stress o his arm, Slider and Splitter(I am a player and a coach, it's is an undeniable fact these types of pitches put more stress on your throwing arm, I would say the Slider is more stress on the shoulder, and the splitter is more stress on your forearm/elbow). Now after getting by the past two years with decent stats with just the FB for the most part, I'm betting this season we see a lot more variety. All he needs now is that one big year before FA and he's got it made.
I expect to see a highly motivated Paps using all his pitches and really showcasing himself this season for that big pay day next November/December. For thoughs reasons alone I think it's better they keep him and cash in, rather the just trading him ow because they have 2 potential replacements.