I do think the Kessel thing is important to bring up when talking about bringing in a new big offensive fish.
Kessel did nothing but produce his entire time in Toronto and people absolutely blasted him. I had my criticisms as well, I'm not trying to say he was without fault. But he wasn't seen as the guy who could put the team on his back and carry them, lead them. Combined with a lack of intensity in other aspects of the game, it makes sense to me that people don't want him as "the guy" on such a large contract when we can't provide him with the proper support.
Does Stamkos offer all of the things Kessel didn't, is he the guy that you can build your Championship team around? Yes, he's one of the best players in the League, but what we need to ask ourselves before bringing in any elite players from now on is whether or not he's one of the best franchise cornerstones in the League.
If yes, bring him in. If not, don't.