@badcloud
Those keys are used with another one to perform an action.
That can be done the same way as the MAJ key one tap activate the key then you press any key to get the shortcut. But I find it harder to use...
You can ask for either the shortcut you miss or to change the feature. The second will take more time and will require that someone dedicate some time to it, IMHO you'll have more luck just asking for the one you need.
Dev time is a critical resource and it will be best used elsewhere. But as you said, that is my opinion and many may disagree with me.
I suggest you go on an open the issue (if it is not already there) for what you really miss.
Edit: Word of advice
The more precise and specific the request, the more it is likely to be done.
If the developer doesn't understand your need they won't be able to do it and it's more probable that they won't go further to try and understand it when so much awaits elsewhere.