Kick has several problems I think. For one, a kick is not a short range attack, and would really not work at all for "creating distance" once the enemy had closed right up into your face (lifting a leg seems unwise when faced with grappling). For another, if someone does move right up into your face, simply pushing them (with arms, shoulders, or legs) probably won't make distance, even if you could bring your leg up to do so, because it'd just be your force against theirs and you'd probably end up grappling. I'd say the way to keep distance is to prevent the opponent from closing in the first place (a kick might work for this sometimes), or to redirect them and shove them off in a different direction as they move in, probably moving to one side as you did it.
As something to stop face-hugging in the game though, I don't mind it too much, even though I'd prefer a shove. My main problem with it is that it does not suffer a delay after a blocked attack. You can attack with a weapon and immediately follow up with a kick, even if your target blocks the weapon attack. The kick was introduced to stop face-hugging, not to subvert the delay caused by a successful defence.