I still think you might be missing my point WTF. It's not about how poorly he is playing or whether or not he can be successful elsewhere. What I am saying, is that IF Semin won't/can't play the style the coaches want (again, speculation) or do what they are asking, and if the team ends up concluding that there is no way he will, then that is an untenable situation. You can't have a single player, no matter how talented not towing the line if you want to be successful. IMO, it's worse to keep that player on the roster than it is to let him go, even if it is for nothing and even if he does become productive elsewhere. I don't care if it's Alex Semin, Eric Staal, Andrej Sekera, etc... There have been a lot of players that didn't fit in on a team, or didn't care to play for a team, or didn't mesh with the coach, etc, in all sports that the team ended up parting ways with because it was better for the organization, even if said player went on to be productive elsewhere.
I'm not saying Peters and his "system" are right, in fact, it may be a failure in the long run, but that's really irrelevant. He's going to be the coach for at least a couple of years so it's up to the players to do what he is asking. If it fails, it's on him.
As I stated earlier, I don't think it will get to this as it is just a "what-if" taking it to the last resort scenario for discussion sake. I really do expect things will get worked out, Semin will turn it around and the team will be better off for it. At least I hope so. To me it's pretty obvious the Canes would prefer to keep him and have him come around. If you are really wanting to rid yourself of a high priced player, you don't scratch him / state in the press that he's not doing what you ask. That just lowers any possible trade value/options. The only reason you do that is to hopefully change the behavior of the player.