I second the feature of letting two hoppers act as one across the system. It's good that they can see the recordings between the two, but it would take the complexity out of the system if the two hoppers would act as one system with 6 tuners and combined recordings. Let it be a feature that is configurable so that people that want to have them separate would still be happy.
One big thing I actually miss from U-Verse, when FFW a show, when you pressed the play button, it would actually rewind the show a few seconds. Example, if I was FFW over commercials, not the skip button, when I saw the program on the TV, and pressed the play button, it would skip back a few seconds to compensate for the lag of seeing the show and pressing the button so I didn't have to skip the show backwards or anything. I actually got good at that timing.