I agree with the things you said.
Best news...Rams can only get better because it's only week #3 in actual live action. McVay sits his starters, so I expect them to be a little rusty.
Bottom line, Stafford looks pretty comfortable running the show at QB. This offense is averaging 31.6 pts a game. It's going to only get better by the time week #8 or #9 rolls around.