No reason Melo shouldn't.
If anything, Melo should be able to thrive more than ever in his sweetest of spots: mid-range.
And have the offense flow where in the critical waning second of a possession (aka, crunch time, or the end of a game) Melo has the ball in his hands.
Melo should be a quality addition to the P&R, too.
And while Melo, of course, will be taking up additional time holding on to the rock, this should be tempered by Amare taking up less of it:
STAT will go back to being the quick, fast-paced inside finisher and on the move finisher that made him the most dominant, efficient inside scorer in the NBA.