Personally, I would love to see the ability (unless I missed it) to create custom menu items/buttons, all using XBMC commands, there are a couple I miss from when I was using a Harmony.
Setup:
HTPC: Acer Revo 3610 (openELEC 3.0.2) with Aeon Nox (4)
NAS: unRAID 5rc12a on an Intel 3GHz Core2Duo with 4GB of RAM and 5 2TB WD EARS Green Drives
Running: SickBeard, CouchPotato v2, Headphones, Maraschino, Plex and SimplePlugins