Personally, I don't think you need a regrind here. You do need it restored (which you could try on your own), but the wear on the side of the blade that looks like heavy hone wear may just be evidence that it is a wedge. If so, when you hone, more of each side of the razor will obviously contact the hone, causing this effect. I have a razor that is restored that looks like that but shaves incredibly well.