Casting call at Sesame Workshop

Acccording to Sesame Workshop's official site, the producers are searching for actors to play a new, recurring human character.  Judging by the list of qualifications, a long-time viewer like me might think the Workshop plans to replace Luis and Maria:

Male or female actor, 18-25, fluent in Spanish and English, comfortable with multiple Spanish dialects and accents. Good sense of humor. Must sing well. Actor should be comfortable with both physical and improvisational comedy. Actor should be warm, likable and engaging. Must be prepared to sing a cappella in Spanish and English.

Granted, Emilio Delgado (the actor playing Luis) is old enough for real-life grandchildren now; and Sonia Manzano (Maria's performer) also helps produce and write for the show that made her famous.  Neither fact automatically means that Sesame Street's leading Latinos will be dropped from fhe cast  anytime soon:  to use a similar example, Alaina Reed played Olivia on Sesame Street for twelve years without replacing Susan.  Both characters are outgoing, lively black women who enjoy singing and playing with toddlers; but Susan and Olivia were never interchangeable.  In the same spirit, I hope that the new cast member plays a character just as memorable and engaging as the classic ones -- without replacing anyone outright.