Upgrades are tempting. I've enjoyed your posts on the super so far, so I thought I would quit lurking and chime in.
My super has the round porting holes and it seems to work as well as any of my other flash suppressors. Out of 5 different .308 rifles I own, only the FNAR has lighter recoil than my VEPR Super, so I don't feel the need to try and reinvent the wheel on that part. Best solution to lighten it up a bit may be to try some 7.62x51mm NATO rounds through it and see if you like that better as they tend to feel lighter to me than .308 even though they are interchangeable in most 308 w