To back up Shy Torques point about collectives that kick back, I think that is an excellent idea that we can learn from fixed wing.
In the Boeing 777 if you try to over-bank, you get a kick from the controls to tell you that this is not a good idea. You still can, if you need to avoid a mountain, but you will be resisted.
I fly a European helicopter that has the possibility of overtorque at high weights and more than moderate pedal requirements. The system is so sophisticated that it will tell me that I have broken the machine when I interrogate the computer on shutdown. That is too late. I want it to tell me with tactile interference that I am over cooking it at the time.
To have the same from the collective should not be difficult. After all, I can get tactile feedback on my computer games which cost virtually nothing.
And thank you for asking the coal face. Few designers do.