Note that Nimoy directed ST III. In the very film where he brought Spock back, he also took pains to kill off his rival for "main character" status, namely the Enterprise.
The 1701-A then had the thankless task of filling in for a fan favorite, much like Priscilla Barnes replacing Suzanne Somers on Three's Company or Cheryl Ladd coming into Charlie's Angels for Farrah Fawcett. It's never quite the same, which was Nimoy's plan all along.
Except........... Harve Bennett has always gone on record as having written the script by himself. Nimoy, I'm sure, had plenty to contribute, but the script, and therefore the destruction of the Enterprise, was Harve Bennett's baby.