Yeah, this would be a better idea. Right now, the medals are redundant. We already can see post count via the actual "post count" counter. It also gives the false impression that more posts = better poster, when we all know that that is not necessarily the case.
Many of the best comments that I've read so far have been by members with low post counts.
One thing, though - if we were to change it so that medals are an indicator of how many "likes" on has gotten, this could still be abused. For example, in one of my threads, I had a makeshift "poll" which was gauged by how many likes each option got. This would artificially inflate my like count. (
http://forum.square-enix.com/ffxiv/t...-Zones-Variety )