I think he's going to be a nice player for us, and maybe sooner than people thing too.
I don't think Melo needs to be a good offensive player to get minutes and be effective in this league - he just needs to improve to the point where he's not an offensive liability.
Look at how Darko has played for us up until now - he's been almost useless at putting he ball in the basket in he preseason, but he hasn't been a liability at least...and so he has impressed us all (including Doc) with his rebounding, shot blocking, hustle and even his nice passing game.
Melo has already been playing nicely in defense/effort areas, he has been (IMHO) out best P&R defender after KG when he's been on the floor and he's actually not putting up bad per 36 minutes numbers.
He's rebounded pretty decently (8.5 RP48), blocking shots at a decent rate (1.3 BP48) and he's been living up to Doc's claim that he's a nice passer (3.3 AP48).
The only things he's done badly are turn the ball over (5.2 TP48), pick up fouls (6.5 FP36), and score (no points at all).
These are all the areas you'd expect a guy as raw as Melo to struggle at, because IMHO his biggest problems are confidence and learning where to be.
His terrible shot atteampts - which haven't even been close to going in - I put down to confidence, his turnovers I put down to concidence, and his picking up of fouls I put down to just not knowing where to be on defense.
In a couple of years time, if he can put up what he's averaging now in 36 minutes (3.5 Ass, 8.5 Reb, 1.3 Blk), play good defense and get past those three trouble areas...then with his physical gifts he's going to be a really solid starting center.
Fab's only 5 games in to the season and I feel like he's already starting to look a LITTLE big more comfortable in the last game or two than he did at the start. After half a season or so of being with the team I think he will look a lot less nervous out there and the turnovers and fouls will go down.
Either way, if Ryan Hollins can stay in the league this long (and play meaningful minutes for us in the playoffs) than Fab definately has a future.