I teach Latin, & approve of this prefix
So, this superstraight/lesbian/gay/bi movement is making increasingly more sense.
I like the fact that if the superlesbians are at Pride, they can talk about themselves, for themselves and about anything that they feel is relevant just for them!
The super/sub prefixes seems fit for purpose and are not terms that are being made to fit, they just work.
And even better, those actively involved in progressing the movement, already have scripts that have been used by another movement so, it is quicker to spool up the activism.