Kadri's a skilled two-way forward that can play a chippy game.
Back in the day, one could say Doug Gilmour was a gritty forward in that game in and game out he was going to give as good as he got all game long and usually had a physical affect on the game most nights. Kadri seems much more selective. Does that mean he couldn't play as gritty a game as Gilmour did? Not necessarily, but his style seems to be much more selective.
Mats Sundin had the tools to be a power forward much in the same way I suspect Kadri has all the tools to be a gritty two way skilled centre, but Sundin also was much more selective. Now mind you, when Sundin decided he was a power forward...He looked like a power forward to me. But that wasn't his m.o....Especially with the likes of Eric Lindros in the league for comparison.
So, no, Kadri's neither a power-forward nor a gritty player in the definitions I grew up with...But does he have a physical side to a largely skilled, chippy game? Sure.
And there's nothing wrong with it.