I think the key is to make solid body contact. If you hit a guy hard to the body, head contact is legal. It won't take hitting out of the game. It should get hitting back to how it used to be. Skates on the ice, no exploding up, no fly by hits that only contact the shoulder/head area.
The league is trying to send that message but gets in its own way with the erratic suspension lengths. Grabner's hit, for example, should've gotten more than 2 games.
Hitting has always been explosive, there always have been head hits, blindsides, and even back in the day they threw in elbows for good measure. Don't even act for a second like hits like this didn't occur previously.