You should add some. I signed up and put a few in there. It was pretty easy.
The one thing that I didn't like about it is the ratings you see are by the person who posts the track with no ability (as far as I can tell) for others to comment or rate the route, or add other type of comments, like good amenities to check out along the route. There's a route in Florida called Alligator Trail that takes Tamiami Trail (US42) all the way across the state to the West and then all the way back to the east on I-75. Holy crap! That would be like the worst loop in the history of motorcycling (imo

). However, there are some cool cutoffs up into the Big Cypress Preserve and Loop Road (which I actually added) etc that could be added and they really need to find a way other than I-75 to get back to South Florida.