I like Koufos a lot more than Ajinca.
And I like our lineup with Gay or Casspi at the 4 a lot too. Gay and Casspi both are fairly big for SF's and when the effort is there don't have any problems playing the 4. And we have a very decent group of versatile players on offense like this. While Anderson is a good player, I'm not sure, that he would be an upgrade over Casspi in the starting 5.
The dual PG lineup may be good for certain situations, but Karl uses it way too often. But parting ways with DC? DC gives us an insurence, when Rondo has trouble with his jumper and the opponents play off of him. We can fall back to last years playstyle with ease and can still have decent spacing even when playing WCS at the 4. This is very important, when you have a great but flawed player like Rondo on the roster. When we reach the playoffs, DC will be even more important.
For me the problem is, that Karl doesn't trust Ben.
But I wouldn't trade DC because of it.
But I'm a guy, who doesn't think "positionsless basketball" is some kind of devilish plan to belittle the value of true big man. So maybe I'm jst a weirdo