Inside the MPD there is (excessive) empty space between the pads and the actual sensors, which makes it so the pad must be hit harder and travel farther before triggering to sensor. So, filling that empty space makes it so that there is more direct and immediate contact from the pad to sensor, which makes it far more responsive. There are pad replacement kits and various inserts made to fix this, but I simply put layers of electrical tape on the backside of the pads to fill the space. Took 10 minutes and 10 cents worth of tape and saved me from selling the thing, and yeah, made it a thousand times more responsive and fun to use.
The RYTM has lights illuminating the pads though, so even if dead space is the issue it would likely be trickier to fix properly. Maybe some clear silicone?!?