Actually, old level 60’s got squished down to level 25. The squish divided your old level by 2.6 or so.
Flying is now only obtainable on new toons that hit level 30. Old level 60’s who were squished to level 25 however, were grandfathered in and kept their flying.
Something similar happened with level 40’s who had fast ground riding. The got squished to 18 and kept their fast ground speed. New toons have to be level 20 to get fast ground riding.