MKG has been a major disappointment -- he's struggling to find any meaningful role in the NBA, and he hasn't progressed this season. Jeff Taylor's a better player.
Might I suggest a variation?
CHA gets: Wallace, Bass, Green, Brooks
BOS gets: Gorden, Sessions, Biyombo, Taylor
You could try to add that Portland pick -- see if the Cats bite. I doubt they do it, but MJ's personnel moves rarely make sense, and they're a pretty desperate franchise at this point.
The Cs would free up $4mil+ under the lux tax this season -- they could then use the PP trade exception plus a pick to a acquire a player they like, should the right opportunity come along.