Hall makes sense, especially if you're exploiting a vulnerable cap strapped Bruins side at the time of acquisition.
Not my first choice, but it's up there. He's almost a lock to put up decent ES points, and the prestige attached to his name may get him a PP1 spot at some point. That way he can produce up to his AAV. If Guentzel is leaving next summer, he could take his spot on the unit.
He ghosts pretty hard during dry spells and his poor defense would annoy some people, but he could bring enough to make it worthwhile. He'd bring entertainment value to L2 for sure, which is probably the most important thing for us.
His term matches our window for playoffs. It'd be nice if Boston retained like a mill.