Dalemebert is just a back-up player. At times he looks like he can carry the load, and physically, he has the skills. But he just doesn't know how to play well enough to play against a skilled opponent. A player like Dwight Howard will dominate him, night in and out. Paired up with a good PF, he could start, but the Sixers need a stronger player to put with him.
I didn't care if they moved Miller. Right now he is helping Lou Williams learn how to be a point, (and draw contact when he's driving) The Sixers need a PF/Center, and if they trade Miller they'll need another point as well.
Stefanski seems to have a good perspective on what the Sixers need, and he isn't going to make a trade just to make one. In truth there were a number of playoff teams including the Spurs, who would have benefited greatly by adding Miller, but none of those teams offered the Sixers enough of what they wanted to make it happen.
Miller's contract expires next season, and so does Giricek's. That will give them a significant bargaining position since they will be under the cap.
The only concern is that they make the playoffs and blow their chance at a decent lottery pick. I doubt that they are good enough- it depends on the schedule. Even with Miller, they have specific weaknesses that better teams can exploit.
Last night the Magic outplayed the Sixers and they could not compete. Reggie Evans was out with the flue. If Reggie had played the Sixers could have hung around a bit longer. but the Magic are too tall and the Sixers couldn't control the boards- something they normally do. That's how small the Sixers margin is. Not a playoff team out West, only if a couple other teams continue to fall apart in the East.