If you are a Disney regular and have been to the parks multiple times, seems you would already know where everything is and have a sense of the rides/shows you do (or don't) want to do. If this is your first time at Disney, then you won't know what you like doing until you have seen it for the first time. In either case, I don't see how a 3rd party paid service will be any more helpful at mapping out where to walk at the parks. Your plan can also change if a ride is down for maintenance/bad weather or you decide the ride line is too long to wait and would rather do something else.
I doubt that any 3rd party can accurately predict future crowd levels for a particular park. Wait time by individual rides seems mostly like guesswork. I would imagine the most popular rides tend to have the longest wait times and crowds increase during the day before dropping off in the afternoon. Before they started with the park reservations, even Disney had no idea how many locals with AP's will just decide to show up some day when there is good weather.
I doubt that any 3rd party can accurately predict future crowd levels for a particular park. Wait time by individual rides seems mostly like guesswork. I would imagine the most popular rides tend to have the longest wait times and crowds increase during the day before dropping off in the afternoon. Before they started with the park reservations, even Disney had no idea how many locals with AP's will just decide to show up some day when there is good weather.