I second this request. I've got a yoke, joystick, a HOTAS throttle, two different throttle quadrants, and a couple of switch panels. If I want to use the yoke and throttle quadrant for the Cessna after flying the F-15 with HOTAS, that involves rebinding all of the axes and some buttons EVERY TIME I SWITCH AIRPLANES. That's considerably more tedious than having to set up individual airplane profiles ONCE. Yes I can double bind the axes, but potentiometers wear out and occasionally spike on the unused devices, which can deflect the controls in an undesired direction or put the sim in a position where it's getting two rapidly changing axis values. To be flyable, the secondary bind really needs to be disabled, so again I'm back in the controls panel every time I switch airplanes.
Per Aircraft control profiles are something that both FSX/P3D and X-Plane have had for years via addons (FSUIPC on the FSX side), and a large part of the community makes uses of these mods for switching between different sets of controls. DCS also has this feature built into the controls menu, and X-Plane is adding native support for it in one of the upcoming betas. While I appreciate your desire to keep the controls menu clean and simple, the OPTION to have per aircraft control configs for more experienced users would add greatly to the enjoyment of the Sim and remove a lot of tedium for us simmers with different controllers. Perhaps a checkbox at the bottom -  Use a different control configuration for each aircraft. Then if you check the box you get a dropdown box at the top with all the available airplanes listed and an extra button to "Copy the general controls to this aircraft".