I was not disappointed to see RSS removed from Firefox, because I want my already too-complex browser to have as limited a set of functions as possible. The more first-class features they remove, the more secure and usable their product will be.
The problem, of course, is that for some people, the removal of those features makes the browser no longer meet their needs. Worse, which features are "critical" varies from person to person.
The flexible answer, of course, would be to have a relatively basic core browser and an extension system powerful enough to allow the features to be implemented that way. Like Firefox used to be. Unfortunately, Mozilla decided to neuter the extensions instead.
