I wouldn't worry too much about it. Others know that Reagan was his own best speechwriter.
Besides, Reagan's desktop plaque said something about how "There's no limit to how high a man can go as long as he doesn't care who gets the credit." Reagan could care less if his critics believed he was merely an actor who only delivered lines given to him in a script. Others know better.
Oh, I agree -- that's why I said, "liberals ONCE claimed that he always needed a script." too much evidence has come out in recent years - such as his hand-written letters and radio broadcasts from the 1970s - that have silenced those who claimed he wasn't a quick, fluent and eloquent writer and thinker. All the same, Noonan is a self-promoter, and when she first launched her self-promotion by blabbing about her speechwriting adventures, a lot of Reaganites were critical of her.