I really fail to see why this is such a problem with you guys. I could see if the comments were "you fucking suck, gtfo" Then I think there would be a problem worth addressing. But as it is I don't see how anything could be done to "improve" things.
If you make a replay, or a vid, its always great to get positive feedback, but the bottom line is you do those things for yourself.
Meamme0 actually brings a good point imo though. I remember a while back there was a rule in place that said you had to go into some amount of detail when commenting, because posts of "ZOMG awesome!!" dont really do anything. But even then, I used to comment the hell out of replays (I even wrote like 3 pages on shooks replays) but anymore I just cba to do it because it takes a lot of time and work. And as far as I know Archlups stopped doing it in part because his replays weren't commented in a similar way.