I've been fortunate enough not to have any type of chronic RSI pain associated with typing. Am I reading you correctly that your pain is due to striking the keys and slamming into the keyboard when the key bottoms out?
That has been my experience. I have noticed that my mechanical keyboard is much gentler and less likely to induce RSI relate pain because I almost never have hard impacts due to bottoming the keys out. On my MacBook (2013 15" rMBP) it's a different story.