Yes.
In the Cinefantastique issue on STVI, Meyer talked about how Roddenberry said that Saavik (It was still Saavik rather than Valeris at this point) shouldn't betray the other characters. Meyer pointed out that he created Saavik, not Roddenberry, and that if Roddenberry wanted to express an opinion on what he did with her, maybe GR should give back the money he'd earned off of Saavik. The quote "Maybe then I'll care what he has to say" has stuck in my mind ever since.
And yes, Meyer later expressed regret about his bluntness there. I think he was right, though. Saavik was his character, not Roddenberry's.