Me thinks the blockstun from Mitsuru's R action to her super is not as great as people make it out to be though. People are supposedly QEing past it after she lands from the R action, and you could likely reverse R action when she lands and tries to do the super (of course I can't say that for sure without solid frame data on it so take it with a grain of salt.) I guess the only logical change to the set up though would be decreased block stun from it if the frame data suggests it's so good though.