That's a good questions LooseCannon and my answer would be no because I like what Sully's doing.
I think he might become a real integral part of the team by year's end; scoring, rebounding and defending at a higher rate than most of us may anticipate right now - that kid is learning "very" quickly. If he learns how to throw his weight around in the lane without getting called for it, which I noticed him do very well several times over the last few games, his game will go to another level for us.
All that being said - if I could find Melo 8-10 minutes a game over a 2-3 game stretch that were taken away from a combination of Bass, Wilcox and Sully - I'd do it in a heartbeat. If we were winning doing this, I would continue it indefinitely.
We desperately need some size and if melo proves he can run the floor hard, work well with KG, throw his weight around and grab a few boards without destroying our defense.
But I really believe in two things:
1. Throw guys into the fire and let them get their noses smacked - good for them, they can gauge where they're and how much they have to learn - good motivation.
2. Give them a taste of what they want - to be in the big leagues, traveling with the big team in the big show. Tease them with a little taste of it, send 'em back to the D-League if needed. But that also should give them motivation to work as hard as possible to get back to the show. I would think young guys could drift sometimes in the D-league, feel forgotten, get down, etc.
I agree with others that them calling up Melo is most likely just for practice. But I would give both him and Joseph some run in a regular game, get 'em juiced. You can always so easily simply yank them, say good job, go back to the D-league and keep working, you'll be coming again soon.