I just want to be able to browse and buy books at the online store without first having to be redirected to the PC software

. I'm not looking for non-book features, but there are some things that could be improved.
How about all purchased books being (by option) stored online and then easily browsable and instantly downloadable from both the device and any apps on various devices such as the PC with the option to sync current reading so you can switch devices mid book and continue where you were. An online personal library of sorts, but available offline too. Buying books would add them to your online library, which if you want, can be set to auto download to your device(s). The process is way more complex than it has to be right now. Oh, and it needs to continue to support all 3rd party book stores and libraries!
I'm not sure how much it's changed on the 650 and other newer readers, but I have a 505 and would like real series information on the reader so I don't have to manage that so much myself, though Calibre helps here immensely.
Basically, I would like usability improvements more than just new features per say.
One can hope...