One hundred percent agreed. Continuity is important, but the fannish obsession with "canon," bordering on religious fundamentalism has become a pox on the franchise.
My hot take: Star Trek VI: The Undiscovered Country suffered because they didn't have Saavik as Spock's protege who gets involved in the conspiracy. It would have added tons of depth to the already good story. Even if Kirstie wasn't willing for whatever reason, and Meyer didn't like Robin Curtis, then they simply should have recast again, or Meyer should have gotten over his attitude about Curtis.
(Sub-Hot Take: Curtis was the better Saavik)