Cute Sayumin Investigator
they could have her host a HeyHeyHey! type show or something like that - still indirectly involved in the music biz, but where she wouldn't need to sing or anything...i also like the 'sayu's usa chan peace hour' - but they'd need to have a segment where she tries to do gymnastics or something, since she's so good at it
that way it'll also be a comedy show
seriously tho, a career in television would be great for her (and for us) this way she'll still be in the spotlight where she belongs