Kathy,
You ask why some want an epilogue. Strangely, that's the first thing that occurred to me as I read the ending and before I saw all the calls for an epilogue. It's a vague feeling to me, but I can understand why there's something "missing" from the ending. The ending has Clark appearing to be drunk, despite his belief that he cannot get drunk.
Because he is not apparently in full control of his faculties, I get the impression that there could be problems cropping up from his state of "inebriation." It might be more satisfying to see what happens the next morning after Clark is back in full control. Anyway, that's IMO.
I like the way Clark did finally confess his feelings, which is something out of character if he was in full control. It helped to give both of them courage to admit all.
Outside of the "missing" feeling, I think this was a great part.
