The thing about Caulfield was never his talent, it was his size. Can he last as a top player or will he get crushed and dwindle off? I know that every player has the possibility of suffering a serious, career altering injury, but a player of Caulfield's stature might be more likely to suffer that fate.
Same to some extent with Pettersson. People didn't worry so much about his talent, they worried about his ability to endure the punishment he would take in this league. So far, he's missed a lot of games. That may effect his long term value. Caulfield could quite easily go a similar route.
How useful is a PPG player if they only play 40 games?