Ok, I'll take Jarred's invitation and describe my perfect module, the GPIO module.
The module allows remote control. But, not wireless and not any type of remote control. It is more suitable for underwater and many other remote applications such as helicopter, crane, etc...
The module has a bunch of addressable GPIO ports. Just about any function can be assigned and wired to a microswitch (digital input) or a 5k Pot (analogue Input). An adjustment of an analogue input shows the current value on the screen overlay temporarily when the value is changed. Functions such as REC, DELETE NG (yes!), Zoom 1:1, POWER ON/OFF, etc.. can be triggered using those GPIO ports.
How is it different to RedMote? It is a wired solution, it is assaignable, and requires 3rd party triggers and knobs to function.
How important is it for me to have one of those? $4-$5k is on the table.