Organizers for “The Nutcracker” say that despite fundraising hurdles, the production keeps getting bigger and better every year. This weekend, 70 dancers will appear on stage during four performances at the Smothers Theatre at Pepperdine University. Malibu Civic Ballet and Performing Arts Society patron Liane Weintraub says such performances offer important exposure to dance and theatre, which remains a principal aim for the annual local production.