As a software developer I can tell you that there is probably a whole team of developers assigned to the HR20, broken into smaller groups working on different fixes and/or enhancements for the same unit.
Just because one feature comes out doesn't mean there aren't three or four other developers working on the the thing that matters most to you. It's not one geek with a laundry list of things to do working the list from top to bottom.
There is too much interest in Dual Live Buffers for me to believe it won't happen. I wouldn't be at all surprised if there were people already working on it.