The RSS feeds have some important disadvantages: no scores, name of the poster of the parent comment, vote up/down links, or parent links. Having to click through an extra link to vote is a major disincentive, and a lot of context is lost. There's also duplication in both the article and comment feeds when things get edited.

The lack of scores may be unavoidable (RSS readers tend to gather posts when they're new and then not update them, so they'd just show zero scores), but the rest should be fixable.