This one is pretty important to me. It's not that I need full fidelity click pits with every switch something I can bind. IL-2's modeling was good enough for me for WW2 era, but I don't like the one size fits all control scheme at all. Profile switching offered an improvement but it puts the onus on me to understand what bindings work with what planes.
DCS is not the only example. Falcon BMS, while limited in plane selection, has separate pages for binding axis and buttons. The axis page ignores button inputs. The button page ignores axis inputs.
What puts DCS ahead in the control department, while having many more buttons available to assign for most of it's aircraft., only controls that are available to the aircraft I'm flying are listed. I don't have to figure out which controls apply to an F-16C or which controls apply to an F/A-18 Hornet. If we're talking IL-2 style controls, this equates to smaller lists of controls per airframe as well as eliminating the need to think about double bound controls for those of us with lots of buttons, axes and switches.
I think for a WW2 sim like we've been used to since 2014, having a drop down menu that instead of individual planes included all variants would be a huge step up. Like if IL-2 had a dropdown menu for "BF-109s" that only included controls that apply to BF-109 variants, a page for assigning only button inputs that ignores any axis inputs, and a page for assigning axis inputs, that ignores button input.. that would make for a less tedious, and even a more newcomer friendly experience, especially as more aircraft get added to the arsenal. P-51 dropdown includes only controls for all P-51 variants, La-5 for all La-5 variants, etc.
