Caveat: I'm not a professional mechanic:
With that being said, I've read in a few places that the sharp line in the root of the pattern is indication that you could take just a hair (Like 2 thou) out of pinion depth.
BUT, if Backlash and preload are in spec with that pattern, I don't think you'll have any issues. Just a difference in "ideal" and "acceptable". The D60 I just rebuilt had a very similar pattern, but everything else was in spec, so I buttoned it up.