Stuart was bought out because dude can't play anymore, and they may as well since either way the cap hit was on the books for this season no matter what. I don't think there was anything about attitude that prompted it, though I'm sure he wasn't a happy camper.
And I don't think Beauchemin is a bottom pairing guy. I don't think he's an NHL player anymore, but man, if there's ANYONE who believes that then they need to work hard to get that done. That's why I also think he needs to sent home. Continued play is only going to either get him hurt or further expose his lack of ability. And besides, if he gets sent home he'll be far more apt to waive his NMC.