That is a reasonable approach if not for the lineplay issue. You have to go ultra low on the block sliders at default holding (like 15) to get realistic block shedding. The issue with going ultra-low on the block sliders is that there is some very glitchy play on PA passes (for both CPU and User) by the line. The O-line will let the defender by and then do this little dance forward and then walking backwards (and they will do it in unison). It is actually a bit comical (cj calls it the "Cha Cha")
Try 80 OS/80 FS/10 Hd with 40/40 for both RBK and PBK and you'll see much improved lineplay with pretty much any slider set....