It's not impossible, but it became more difficult when the Padres gave themselves a fighting chance at winning a playoff spot last year and came one epic late season collapse away from beating out the eventual Series winner to a playoff spot ( you know, and I know, that there's some extra emotionality in the World Series coming to the team who got the spot you were fighting for)
Basically, the Padres are at best hopeful enough, at worst deluded eonugh, to think they might have a shot next year and having a shot is good for the bottom line. Trading Adgon is hard to justify under that circumstance and it may be bad at the ticket window as a result.
I predict he'll move in the end, but only in midseason, the Padres FO will give their squad the first half of the year to establish whether they think can get to the playoffs or not. If there's a reasonable chance (which my WAG defines as "The Padres are within 2-3 games of the division at the deadline") I think they go out and buy talent, GFIN and settle for the pick -- a gamble, yes, but one small markets take from time to time. Only if the Padres are well out of the playoff picture is Adgon to Boston a significant possibility.