I would not categorize them as overrun with venodrs, but do expect to say "no gracias" ... Zijuatenjo/Ixtapa gets far fewer tourists so the beaches are quieter.
I saw your other post and wanted you to know we have been on Carnival Pride, Diamond Princess and are booked in November for NCL Star. We also have done Carnival Spirit.
I booked the NCL Star due to the ports, because we have only been to Acapulco and Zijuatenejo once. Also, I like frestyle dining (such as offered on Princess). I would *not* let avoiding LAX be your deciding factor.