Tbf, 7K was OP when it was a guard break. 12f + frame advantage was a bit much. It's fine as it is now. However, I'd like to see 4P and/or 4K guard break or at least be safe.
I'm not opposed to your other suggestions at all.
It was supposed to be OP. People love to block against Alpha, and it drives me nuts. Back in the day if they wanted to play that game I would 7K the shit out of them and love doing it.