I agree with that - including that Goff can definitely improve.
I think with McVay, Stafford can be a difference maker. Frankly, I don't see the type of melt down games we have seen with Goff at times going back to Detroit/Chicago etc in 2018 and continuing on this year with the Fins etc.
Belief in your QB makes a big difference. While I know the Rams LOVE Jared Goff, they also know that they can play better at that position (In my opinion).
Also, I have no doubt McVay's sole fixation is to win a championship and if he thinks this is the best way to do it, I am ALL IN.