Probably will be historically underrated due to the Leafs move and contract...first part of his career, peak athletic scoring seasons were in DPE II and second part of his career has been defined/dogged by his contract and the unfulfilled promises of the Leafs during his time there.
Unique, unique player with his slow-mo style and other-worldly anticipation in the offensive zone. Will rightfully be knocked for lack of physicality given his size and defensive acumen but although he came off his peak rather abruptly, he is entering IMO an extended spring to his career due to his ability on the PP and lack of need to be a burner to do what he does.
I suspect he will be useful to a ripe old age - he can win draws and provide points with a man advantage (though to his credit, he's been a better than usual ES scorer this year). That should give him a very good opportunity to add significantly to his career point totals. He should be around 1,110 or so by the end of this year. If he ages gracefully as I suspect (in terms of being a point compiler), he could have 4 more fairly significant scoring seasons left in the locker...there could be 200-250 more points there which puts him in pretty significant all-time scoring territory with 2 Hart finalist years early in his career.
I predict after this year when he gets on a "normalized" old guy contract, his rep will go up significantly and some teams...the Leafs, or whomever - will have a very useful and productive old guy on their hands, in the right situation...a late stage Benn/Pavelski type.