i would say chisel grinds are mostly for self defense, which imho they work just fine for that, the zero bevel grind blades from emerson are something to behold, let me tell ya, but even a std chisel grind will work fine for most stuff, not as good as a 'v' grind, but it will work.
as far as for SD is the CG better than a 'v' grind? probably not imho, imho EKI knivesd are CG's because he started out making CG's, liked 'em, and he's stuck with it, imho its a marketing thing now.
if ya dont like 'em dont buy an EKI, simple enuff imho.
if ya have an EKI i wouldnt try and make it into a "v" grind, most of the ones i have seen were funky, i would send it in and get it rebeveled to be more like a ZBG, i have had a commander that someone reground into a std "V" grind, and it looks like it came that way, and cut good to boot(while most i have seen fail on both accounts lol), dont have a clue who did the work though. so i would either rebevel or simply swap it off.