IMO, they got rid of cooper for a few reasons:
- Vaccines
- He took some shots at Moore
- His productivity was variable
- His cost
Just about all of it ended up being BS, which is why some of us are irritated by it. He was right about Moore, his cost is no more than Gallup + Cooks, up and down productivity is normal and the vaccine thing is beat to death (and I won't discuss it here).
Dallas would be better with Amare. Its not the end of the world. We can play these hindsight games all day long. It probably only comes up because there are some hanging onto the idea that dumping him was justified for one of the above reasons.