FeedLab is the best Feedly client running on Windows Phone. And after today's update to v1.4 it is even better.
Here's the changelog:
- Transparent live tile option (enable from settings)
- Adding interactions on the image of an article: zooming, sharing and saving
- Improvements to English translation
- Improvements to the image quality on an article
- Bug fixes and others improvements
You can download and try the FeedLab app for free from the Windows Store