I've seen a couple at allaire now, and also noticed strava has e-bike rides, I guess to keep from taking segments from manual peddlers? the few people I know that have tried them have only good things to say.
I went clipless for 3 months last winter.. the 2 advantages I saw were climbing was a bit easier and the fact that you have to commit to an obstacle.. but there was other physical discomforts I was experiencing - I tried positioning the cleats differently etc.. in the end I just went back to...
Cheesequake, while short, isn't very beginner friendly... lots of punchy climbs.
Mercer or Wharton would be perfect if looking for elevation avoidance. Clayton involves climbs as does Huber. Allaire has some climbs if you look for them. Hartshorne will be hike a bike for beginners.