Yeah, the dropping out is a big deal. I just took at look at Remix Redux 8 and they had a total of 283 works, 23 of which were HP and I think only 9 were Remus/Sirius. I wonder if there would be more of response for a strictly R/S remix or not.

On another note, their pinch hitting strategy seemed to work well, but then it is a huge and very popular, multi-fandom remix.

I would definitely help.