I bought a Cherry MY board from somebody on this forum - I can't remember who, it has been a while - and he had done something that brought the force down to the 15 range.
I tried using it for a while, and while there was something nice about it, ultimately I gave up on it. It was relatively cheap and I had bought it to harvest the keycaps anyway, so all was OK.
The mouse switch idea is intriguing, as long as there was tactility you could probably get away with a very low force.