I suppose the design could be better, but slick design basically encourages people to get in and out fast, and that's not really what the site is about. Search works, the design encourages people to stop and take a look around, and all in all it rewards a more leisurely approach.
More to the point, it feels like a family. Today, for example, I was pleased to be greeted by the Christmas banner, which I'm quite fond of.
Could there be more ways to present the site? Certainly. But they're not priorities to me. I'm just happy the site is here, and that people are willing to put in time and effort to maintain it ... and to add new scans and new comics on a regular basis, which is after all what a "Digital Comic Museum" should do!