Parrying is just too defensive oriented.
Likewise, guardcrushes are too offensive without some kind of ‘GTF off me!’ that doesn’t sacrifice guard meter (or super meter).
If Alpha 3 had something like pushblock, where you can’t just mindlessly run down an opponent’s guard meter until they’re opened for a major combo, I’d think it a much better game. Note, though, that I’m not in favor of giving the defender free damage for a block (coughAlphacounterahem). This GTF off move would be something to make the opponent be pushed back father, or stun them only long enough for blockstun to end, and resetting the situation.
Another mechanic I like is choosing when to rise when knocked down. CvS2 had this mostly right, with knockdowns being tech-rollable in some grooves, or ‘playing possum’ for an extra few moments to make an autopiloting player whiff a meaty attempt in others. This isn’t too much of an advantage for the person knocked down, because they’re still in a bad situation. This just makes it so it’s not completely hopeless.