I like it the idea of an interval between publication and comment! However I don't think back-and-forth is necessarily bad. I'd modify your proposal to includ

I like it the idea of an interval between publication and comment! However I don't think back-and-forth is necessarily bad. I'd modify your proposal to include two or three rounds of rebuttal, each at a 3-day interval. You'd have to be seriously invested in the discussion to participate, and there's very little room for a flamewar to develop.