This site for submitting and voting on questions from the public for use in the second debate is, on the face of it, a good idea. But I'm skeptical. The Obama administration tried something similar. My impression is they found many, perhaps mostly, crackpot issues--I'm using a broad definition of "crackpot". It's IMHO a populist idea. We shall see what questions actually come out of the process, hopefully not the ones with the most vote.
I spent a little time there and voted for one issue (legalizing pot, not because I think it should be, but because it's a valid issue and probably not one which would be asked in the usual way.)