There is a reason that the 76ers had a tough time to build a really, really good team around Barkley, because Barkley's skillset required players who are less likely to get, because there are not that many of them.
Maybe you take a time machine back into the 80s and tell the Sixers brass/coaches that instead of putting the blame on Barkley. They made him their guy and implemented him as their bruiser in the post. He did that that -- and now he's the scapegoat for it. Only in basketball/on RealGM

You are shifting goalposts here, first you wanted to have Birk as backup, now you want him as player next to Nowitzki.
No, I'm keeping this about team performance without the player. Dirk misses playing time, Birk steps in and the team chugs along without him. A pretty +0 SRS change. Dirk "sucks" now. Where's the "impact"? What if Dirk plays with Birk as a backup and plays on a crappy fitting team/team that ? But still gives you the scoring/solid play he's capable of? Someone on the floor has to score. He does his job -- and he's blamed for it.

As I said, if you think I'm just too stupid to get something which is easy to understand for you, than just say so, at least it would contain some honesty.
I don't think you're stupid; I'm simply making some points. So don't take it personally. FTR, I'm not even saying to put Barkley here at #17 at all (like I said before, I'm figuring out where to slot him in), but these threads tend to turn into "+10 impact! GOAT! +0 impact? Worthless!" (Pardon the hyperbole.) Vote for who you want to vote for, but someone has to comment on the things that are being typed here.