You should always link video when being the OP of one of these posts.
Kuzy is low and making a pass and in a vulnerable position.
McNabb comes in to make a check, after the check his arms go flailing around and catch Kuzy in the face.
He did not leave the ice until impact. Him leaving the ice is a result of the impact. See clipped image below. He is making contact and both skates are on the ice. Watch the second angle video it's easier to see there. He did not jump as you stated. I know you're a fan but look at the evidence and take your fan glasses off for a second.
I do not believe McNabb intended to elbow him in the face. You can't say he did it on purpose. It wasn't even until after he made contact that his arm went up into his face. I think his arms went flailing due to the impact and caught Kuzy.
Either way he needs to control his arms, especially because Kuzy is in a vulnerable position. He could have also gotten a little lower in his stance. He see's Kuzy is low.. he should try to match that to prevent any incidental illegal contact.
I don't think this is suspension worthy. Fine worthy though. Keep control of your body.
Side note... any single cap fan that says this deserves a suspension and the Wilson hit on ZAR did not please just delete your post. That would be extremely hypocritical.