If it is used incredibly rarely then offload it to a tablet or a PC or (heaven forbid) a phone. Let people load the menus they actually need and want on to the phone and put an interface on the camera that doesn't suck
Yeah, make it so another piece of equipment is REQUIRED to change settings, that sounds like a menu that I want..... NOT.
Wrong. If the menu isn't useful then it was designed wrong. A feature that isn't efficient is a bad feature.
The menu on Canon hardware is just fine. As stated before, all commonly needed adjustments are available on the outside of the camera body. If you don't want the options to control the little details to set up the camera to YOUR personal photography style ( that you generally change major components of very few times in the camera life ) then go buy a point and shoot instead of a mid / high end DSLR.
I have quite literally worn out two Canon DSLRs and shot well over a million captures, and never once has the menu gotten in my way of getting the capture I wanted. Especially now, with the tilting / touch screens available, you very rarely have to go into the menus unless you are changing some very deep level stuff in the camera. These are the things that are pretty much pro level, and get changed only several times over the life of the camera. It would be stupid to take the control away from users since these items are generally changed at setup time to personalize the camera to the buyers style.
Likewise, having two differing menu styles for entry level / high end DSLR cameras is stupid. Not only is it more work, but it would be a barrier to people progressing up your product line if they had to not only learn the lower end product, but then re-learn everything once they decide to try a higher end product. As it is right now I can grab the bottom of the barrel entry level Rebel DSLR or the top of the line 1DS that is out right now and use either one without having to really think about the menus or how to set them up... and that is how it should be.