Great to know that the sort option will still be implemented properly. And you're right - my wife deletes things mercilessly. I don't think we'd ever catch up on a backlog of 60 programs.
If you're still collecting general suggestions for UI enhancements one of the neatest features I've used (from and old Series I Tivo) was the way it would skip back a bit after you finished fast forwarding.
So when you're blasting through the adverts, and you see the program start again and hit play it jumps back a few seconds to take your reaction time into account, and you don't miss the start of the program. The amount it skipped back was dependent on the fast forward speed being used.
It seems a very trivial feature, but once you've used a device that does this you can't understand why every remote doesn't work the same way. One for the roadmap perhaps...