I don't know why Prospal would not be a valuable contributor to the CBJ this coming season. There's no way of getting around the simple fact that he was the leading scorer on the team last season. I would think that Gaborik or one of the developing younger players will be the top CBJ scorer this season, but it's still a team which probably won't be lights out in scoring productivity and VP provides much needed firepower.
As I look at the CBJ roster, it's apparent that there are many potential weak links in the forward position. Is management content that players like Umberger, Johansen, and Comeau will play good, consistent hockey over an 82 game season? I see at least one likely complete bust among this group. Other players have had reasonable starts to their career, but are hardly established. Atkinson and Calvert have 71 career points between them compared to Prospal's 765. When injuries hit, are JK/JD content with the likes the Jenners and Drazenovics filling in?
I don't think the Jackets are near solid enough in their forward ranks to allow a player as productive as Prospal to walk. Forget about his other characteristics and the "agreement". He ranks as a top 6 forward in the current assemblage of Jackets forwards. Prospal will be getting $1.17m this season (and the following) from his buyout of a few years ago, so money should not be an issue in this case from his perspective.
I see way too many reasons to bring back Prospal and really not one good reason not to. Unless there is something that has happened which created some rift between VP and management, I'd really be disappointed in management if they just let him walk. It just doesn't make any sense to me.