Even taking into consideration Tucker's limited minutes and limited exposure (to top 6 forwards), I thought he was pretty impressive during his brief time up here. With the current configuration on defense - no Scandella or Perunovich - Tucker looks like he's played himself up to the No. 8 spot. In other words, the first guy up from the AHL if one of the current D-men is sidelined for any kind of lengthy period.
He's gotten himself on the radar and looks like he could be a 5, 6, or 7 defenseman at the NHL level.
As for Scandella, maybe he's easier to trade with just one year left on his contract, which will be the case after this season. And you're right, since he will have missed all or most of this season, the return won't be, uh, bountiful.
As for D-men playing their offside, it's not always easy. But Mikkola has had experience playing the right side. And Perunovich played the right side almost exclusively in college.