I guess I saw that one way conversation as an example that Han knew Chewie very, very well, even being able to understand his completely foreign language. But I guess it's still so nostalgic to me that I try to explain any faults. :(
Don't worry, nostalgia or not, the whole thing still looks and feels amazing (IMHO). It's very easy pick apart a movie, and there's very little point in doing so. I think I might try to interpret it in your way. :)