It's a really tough call as I see it. I think there was agreement that he made a significant contribution to CLF but it seems that technically CLF existed, even if not in a completed form, before he returned from training with Green Grass Monk.
Seems to me that unless Chan Heung recognized him as a co-founder it's a gray area that could be argued either way. I think the top ranking players in all branches will need to get together and go over all the available documentation and evidence and make a determination that most are comfortable with although that sounds impossible at this point in time.