He has some interviews where people ask him about LGBT rep and he answers that indeed he wanted to put LGBT rep and that "maybe there alredy there" but since the characters at that time (v2) where teeneagers they have to grown and discover themselves. And from far I seen in the show the ones that had good develope are Blake and Yang (also since concept art yes bc even their palette colors complement each others and we know how important the colors are in the rwby universe)

I didnt know him but from his Interviews and people that worked with him so close, Bumbleby was planned from the very beggining of the show.