Shaq's weaknesses are massively important and none of his strengths are to be considered
This is precisely how I feel about the issue, given that Shaq's weakness is his dubious ability to fit into any sophisticated defensive schemes, and his strength is whatever remains from his ability to score inside.
Some skills are just more important than others for the position of a backup center.
You said it perfectly! He is a
back-up center. You know, just like the Lakers have 38 year-old Theo Ratliff and Miami has ........what's his name and Chicago has.... what's his face and Orlando has Gortat. At this point, he is the #2 center on the team and may be 3rd if Perkins comes back healthy.
As for the issues in Cleveland, who cares? Rondo, PP, KG, Allen and the guys had their issues too....... including Doc.
I'm not in love with the signing, but I like it. Shaq wants to play two more years. Since the C's signed him for 2, maybe he'll realize that he will have to do things right in order to get 1 last year anywhere.