I think the current way of opening and viewing replays is a little bit too much work for many people to actively look at others replays.
It works, and its not much work but if there was a faster way of importing replays I think many threads in the replays thread would get more veiws, and in turn more cnc.
So why not have a ingame replay importer where you can just drag a replay file into it and then you can just watch the replay.

It doesn't have to be implemented, but I think it would help.