It happens at all grades though, not just legends.
Maybe introduce interim levels for each grade, such as
Legend 1st class Average 55 or under
Legend 2nd class Average 55-60
Legend 3rd class Average 60-65
Legend Newbie Average 65+
Doing this at all grades would give you more targets to aim for, would allow WGT to introduce more RG tournaments that lower rated individuals within each grade would be more likely to enter, knowing they have more of a chance to win/place.
You have to wonder how many people don't enter RG's because they know at the outset they have literally no chance of doing well.