Yup, everything's already there, just a bit disguised:

* Feed before original site? No problem, set Feed as the default in Preferences. Also, if you like one view or another, it saves per-site.

* To read all stories in a folder, just click the River of News icon next to the folder. It's exactly the same. You can also right-click the folder (or click the little arrow) and mark the folder as read.

* Plenty of Keyboard Shortcuts. Type `?`

* I'm working on more customization of the interface as we speak. You'll be able to move panes around, change sort order, etc.