Not exactly, because the movie was slimmed down much more than he wanted. When I wrote about "clauses that ensure scripts aren't radically b̶u̶t̶c̶h̶e̶r̶ , er, revised," I meant for that to include final product edits that are significant enough to amount to de facto script revision.
(In that case, I side with the studio over the actor, but, that's neither here nor there.)
Maybe, but if actors had script approval, including control over edits that are so significant that they amount to script revision, you'd probably have fewer cases of actors being unhappy with the de facto script they ended up with. (I often wonder what the Sequel Trilogy might have ended up as had Mark Hamill insisted on script approval, including whether Disney would have agreed and hired him at all.)
That said, I disagree with your assertion; I think that on average, actors, being storytellers at heart, probably do have better "understanding of what makes a story work" than studio execs, who tend to come from less creative, business/managerial backgrounds. Also, recognizing good writing is not the same thing as being able to write well.
Madame Web was a b movie with b movie expectations, that hired c-list actors. They don't get script approval. Script approval is for winners who can double the box office on name recognition alone.
The little Latina who had almost had no lines, is an international pop star, who should have bought all of south America to the table for Sony.