One thing to keep in mind: I believe the 1-10 scale is calculated based on the distribution of crowds, so a 1 is "in the 10% least crowded days".
If you calculated the average wait times for every day of the year, a 1 would be in the least busy 36 days, a 2 in the next busy 36 days... and a 10 would be one of the busies 36 days.
But that doesn't mean that a 1 is 1/10th as busy as a 10. The least crowded day of the year could still have a 45-minute wait for 7DMT or a 90-minute wait for FoP!
The specific wait times for individual apps are more useful in planning your day; otherwise the 1-10 scale is marginally helpful, mostly in choosing between park days on a longer trip.