There was a lot of feedback to my last post about a rewrite/redesign of Liferea. Practically everyone agrees with the performance problems to be the top priority and most of you believe that a rewrite is the way to go.
Current ideas include further improving the UI code to simpler and conceptually clean GObject implementations (suggested by Arnold Noronha) and redesigning the Liferea core to use a task handling solving the performance issues as implemented by GTask (suggested by Christian Hergert).
Several commentors mentioned a missing general plugin system for easy extensibility. It may be that such a plugin system might motivate the one or the other to hack some quick add-on and might get more advanced users interested in doing things with Liferea.
For everyone who contacted me via blog/chat/mail: Let's wait till coming sunday to gather all feedback and then make some plans. I plan to collect everyones topics of interest so we can make a list and organize appropriately.