Perhaps we could try to gather wishes for firmware update in a designated thread. Such a collection of wishes & demands have turned useful for other systems, so let's have a go here as well.
A few starters picked up from other threads:
* Ability to use the 4-way back button for back-focussing (yes, please....)
* Ability to change aperture on L-lenses when in video mode
* Add 24 fps in video mode