Maybe it would be worth running a poll to see what features us "superfan" users actually consider essential. I tried both mouse and track version and ended up settling on track to my surprise. I also now use them wired instead of wireless. The wireless functionality went to sleep too often on me and I got tired of waiting for the devices to wake several times per day.
I ended up buying my own USB cables so I could run a separate cable straight back from each Track instead of the "horseshoe" cable that daisy chained the units as was intended for the cables that shipped with the device. (Also got white cables to match my desk).
If you remove the need for wireless, I wonder if it opens up the possibility of collaborating with companies like ergodox that are operating in the same space and have developed some really nice tools for configuring custom keyboards and flashing firmware, etc. I say this naively without doing any real feasibility research

I seem to recall a post elsewhere on the forum to the effect that the custom wireless of KeyMouse meant you had to write all your own firmware from scratch and a custom configurator. Would also love to see some of the features of ErgoDox come to the KeyMouse as well, like dual-function keys.