Wait a second, who are you getting feature requests from?

It sounds to me like you need to examine your market and talk to the people who are asking for things and figure out what problem you're solving for them.

If people care enough to send you feature requests, then you need to look at what's driving them and how you can reach others like them.

It sounds to me like your product is close enough to an unmet need that it's picking up signal, but that you haven't quite found the place to really dig in for the results.