RFNJ, those are excellent points!
Years (and years) ago we used to stay at the Hotel Boca Chica (on the north side of Caletilla) and really enjoyed. Of course, it was a short few hours drive from Cuernavaca, and it had its own bay - I learned to scuba dive there in 1954! If you got tired of the baylet and Caletilla - Caleta, you could always take the motor boats to Roqueta island - I think they have had a series of beer-drinking donkeys there over the years!
Amazingly, the Boca Chica continues - now operated by Design Hotels! 60 years later - quien lo pensarķa!
Got to say, I still like Zihuatanejo for a laid back and less crowded experience.