I would agree that we are pretty full up in respect of the PF/C position with al, favors, milsapp, kanter and evans.
And we are pretty full up at PG as well with williams, tinsley and watson - obviously this is not as talented as our PF/C position. It would be nice to probably upgrade/replace watson with a better talent - but what is out there? Patty Mills (i am biased as an australian) - but he showed, alebit with the spurs, that he could shoot very well, incl treys, and was energetic and could run their offence. JOhn Lucas from the bulls is another who played well in rose's absence. Obviously these guys would be on a wage well below the MLE.
In respect of SG/SF - we currently have williams, hayward and carroll at SF, and burks and hayward at SG - maybe you would say we could add another SG - I personally like shannon brown - is a bit underszied, but super athletic, can shoot, and brings a good intensity. In the end tho, I suppose we all hope that burks, hayward and williams will deserve to dominate the minutes at the SG/SF position, and therefore, any new person will merely be a back up.