Probably because you can still see (subconsciously) the grain structure. It hasn't been DVNRed to death, so it breathes...
Also, when I said it looked good, I meant compared to what's out there. For non-film people, the difference between Eastman and LPP doesn't make as much concrete sense, but if you've ever worked with the two, as I have, believe me when I say that LPP is miles beyond Eastman as far as color. The final version will be awesome, I just know it.
-1, I think this has been said before, but I'm pretty sure your project has decimated the GOUT. I think that for OOT, yours should be base 1 for anyone using frames or clips (like Harmy did) from the GOUT.
Great job!