The only e-bikes I've seen in real life that go too fast for MUPs are class 3 and they aren't legal on most MUPS anyway. Class 1 and 2 are capped at 20mph. A fit adult rider can go 20mph on a traditional bike without much difficulty. I got my first ebike years ago to be able to ride with my adult son - he still left me in the dust, lol. These days I am passed constantly by road bike riders, who pass me like I am standing still. It has nothing to do with the motor and everything to do with the speed, regardless of how it is obtained. Also, why do you care if someone is pedaling or not? Whether they choose to get exercise or just use an ebike for transportation rather than pollute the planet and wear down the roads with a car is no concern of yours - as long as they stay within the legal speed limits on the MUP. Check your value judgments. I'd much rather see more ebikes (obeying path speed limits) with people not pedaling than cars on the road.