If you get a 1st for him or a bonafide prospect he should be gone if he isn't willing to sign for around 4.5M x 4 yrs. No way I would go above 5M given his production so far. He want's 6M+ and I'd tell him to get a good bottle of scotch, a ticket to Islay, and "Yodel for Dummies" book in duty free for the flight.
Back in the day when they held onto Loui I was Ok with keeping him even if it was a stretch to make a run because that team was scrapping and he came here as a UFA, took his lumps, and did what he could without any noise or politics. This is a bit different IMO because this kid has asked out once already, and all the while being hot and cold on the ice which you cant be as a core guy. Not saying Bruce was right or wrong, but at some point, if you want the coin you better be a consistent producer and a core (or project to be) player. He is neither after 9 year so fish or cut bait.