Since Miller can leave and the Sixers are against the salary cap, they will be involved with free agency whether they want to or not.
IMO, this Sixers also need to find a big man to replace Ratliff if not Dalmbert.
Since I think the Sixers are determined to play Iguodala at the 2, Thad at the 3 and Brand at the 4 spot, we will need to determine who our point guard will be and who we can get to help at the 5 spot.
I actually think that the Sixers need to be concerned with rebounding and inside scoring, although I think having Brand instead of Evans will help. I just don't see the Sixers competing against the Celtics or Cleveland or Orlando without more than Dalembert, Speights and Smith at the 5.
I would rather loose Miller in a sign and trade if I could add a player like Millsap or Boozer. IMO, we have enough decent passers that if Lou Williams can keep his turnovers down, we could get by with him as our point along with Jrue or some inexpensive free agent.
Ultimately this is about the Sixers direction as a team. Miller was a big part of last season's success such as it was, so dropping him is a big decision. I think that Miller is a fine pg, but a serious liability on defense. I think our lack of strong defensive stoppers in the back-court hurt the Sixers more than anything this past season. I don't think the Sixers can win a championship with Miller as their 1, so it makes little sense to try and keep him. But it is important that they try to get some value from him in a sign and trade.
The sooner Miller leaves the sooner the Sixers will be forced to solve their point guard situation, and the faster they can get inside help the less important a scoring point guard will be. Free agency could work very well for the Sixers and I would say that this is the biggest challenge Ed Stefanski is facing since it will determine how competitive the Sixers are this season.