To open up R1 for additional modifier (which I support) --- my preferred change to blocking method would be to use the Right Stick (like fight night)
R2 + Up = High Block
R2 + Down = Low Block
R2 + L2 + Up = Deny Clinch
R2 + L2 + Down = Deny Takedown
Perhaps R2 + LEFT would allow you to paw/parry that side; R2 + RIGHT the same; but then again I want to get away from Parries for sure lol --- maybe those are 'strong blocks' that have a better chance of fully deflecting damage from strikes coming that direction (but leave you open to the other side! RISK AND REWARD)
Whereas the 'standard' high block of R2 + UP might only block 2/3rds of damage; or the guard would be broken down much easier with a variety/volume of strikes, etc.
Although all that I really care about is that we do *not* go back to 'weak block' where the push of just one button will block ALL areas with super-human speed and accuracy
Next step in striking = developing a very dynamic blocking/guard system; and probably some more intricate controls would help (i.e. more than just R1 or R2)