Quick breakdown of Granlund's stats this year before/after coaching change:
5v5 G60
Before: 0.2
After: 0.8
5v5 P60
Before: 1.2
After: 1.8
5v5 S60
Before: 5.1
After: 6.2
5v5 Sh%
Before: 3.9%
After: 13.0%
5v5 ZSO% Rel
Before: 12.4
After: 13.0
5v5 TOI/G
Before: 14.6
After: 12.6
PP TOI/G
Before: 2.6
After: 2.4
PP P60
Before: 3.1
After: 5.5
Interesting breakdown for Granlund. His ice time has actually gone down under Torch but his productivity has gone up. Increased goal scoring is mostly due to luck, but he is shooting a bit more. Not a major swing in terms of possession stats or zone starts. On the PP, he's getting about the same time but much more productive. I'm guessing that is a combination of team luck and an improved scheme under Torch.
His total year scoring isn't that great. 5v5 P60 ranks 101st among NHL centers with 500+ minutes, which is below average for a second line center. If he were to keep up his current scoring pace, he'd jump up to 48th, ironically tied with Ryan Johansen. PP P60 is 68th among NHL centers with 100+ minutes, which would maybe be average for a second unit center, although his pace under Torch would bump him all the way up to 16th and tied with Tyler Seguin.
Based off the eye test, Granlund seems to give a consistent effort and doesn't shy away from physical play at all. His speed was a concern in the past and I'd say he's at least average if not slightly faster. He seems to keep his feet moving rather than stopping and starting and that allows him to push the pace of play. Size and reach is still a concern and I don't think we've ever seen him get a breakaway. He does tend to get too cute when playing with Vanek, but his play with more N/S players seems more aggressive.
I don't think we've seen enough from him to offer a long term contract and I think he could very well be trade bait this summer. He's definitely not the top line center the Wild wanted and needed, although with Koivu's decline they definitely can't afford to move Granlund without a better option. He's a decent second line option but with Koivu as a well below average top line center you have to upgrade at least one if you want to win in the playoffs.