I love this idea. I read Pitchfork, and use that to get an idea of what’s coming out and what’s meant to be good, but don’t read any reviews anywhere else. (I occasionally read DiS reviews, but my default is to go to the forums, and for some reason there don’t seem to be any promotion of content or links back to the main page).
Anyway, I don’t keep up with what’s new very well, but regardless of that I want to know what’s good. I don’t really care much if that good thing was released 1 day ago, or 3 months, or even 5 years. So I’d be highly in favour of a shift in focus to records that have been out a while. You don’t even have to fully commit to that, just do a few reviews with a 3 month delay, give that series a catchy name and a link to read them all, and see how they get on.
My other suggestion is to have an easy way to search reviews on the site, or at least the equivalent of a Pitchfork ‘best new music’ tag.