This would make most stabs completely redundant. If you don't spin, it whiffs, or has a high chance of doing so. This would need to be solved first.
But mostly, if someone spins, block down.
I'm not too fond of removing it, though I've never got the hang of it myself. Not much stabbing with my preferred weapon. But, I don't think it should be removed. It's a valid tactic to an attack direction that would otherwise be gimped.