I think everyone on this forum has a role to play, threads die with no replies because everyone looks to the more experienced to rain joy down on every single thread, who's to say someone in learning can't give great advice. Every little helps so if you notice someones not getting any feedback, whats stopping you? someone more clued up about theory will of course talk more directly, which not everyone will understand. But they're making the effort to give good critique, it doesn't mean they're perfect and catering for every level of artist.
This thread is a great place to go to see topics previously covered, but I doubt critiques will evolve into directed links to echoed comments, because every piece of art is different and everyone has different paths they want to take.
I see this place as the community trying to make things easier for the common pixel artist, good idea I think and some good reads.
