I think it's a bit strong saying it's "actively hostile" to power users. The developer takes a very specific view about why he has the limits set-up that way: I think a lot of people would like a different level but he makes sense over the fact that most people don't go that far back on RSS. And in fairness he's added a lot of other power user features like keyboard shortcuts.

Personally, I really like Newsblur. It's available on all the clients I care about, it's pretty fast and it's Open Source with a sane business model. I'd really like it to have search as that's the main thing that stops me finding good trends in my RSS feeds.