"Linsanity" was a max-level player. While that would be nice, I don't think we need that - and shouldn't expect it. In clutch spurts would be more than enough.
Until the playoffs, I was happy with how he finished the season. The one thing about Jeremy Lin is that I don't doubt that he is putting the work in. I expect to see him improve because it is what he has done his whole career.
Off season improvements is where I see Jeremy Lin strongest strength. The Jeremy Lin of the warriors is leaps and bounds below the Jeremy Lin of the Rockets and that is because he dedicate his time in the off-season to vastly improve on his game. Last season was a standstill as he was rehabilitating from his injuries and I believe he still improved a lot in terms of iq (remember those nasty turnovers he used to make in the Knicks? It's been toned down a lot), expect some major improvement this season. I believe with the pillars in Harden, Howard, Asik and Parson, Jeremy Lin will be the x-factor.