Ours is doing 6 this season with individual music and choreo. We are a newer gym, so our 6s are our highest level - it's a trial and error process! Half our 6s did a full season of 5 last year and the coaches decided they preferred the flexibility of level 6. So our 5's moved to 6 and they scored a bunch of 4's out of 5 to join them at level 6 rather than do the full season at 5. They are all loving their personal routines and music -and so are the parents! Meets go so much faster when there's a variety of music!
Slight tangent here...if your gymnast competes 6 at her current gym and then makes a switch to a new gym that skips 6 (moving directly from 5 to 7), is a gymnast allowed to go back to level 5 if they don't meet the new gym's requirements for moving to 7? (Lacking giants or connected series on beam, etc)
I know you typically can't drop back once you compete at States for a particular level, but considering the flexibility and optional nature of level 6, is it different in that case? Seems like when gyms have the option of using or skipping level 6, I'd think this issue would come up!