I agree that if you have a bad QB, you should be more creative in your playcalling to create an effective offense--a la Baltimore last year.
The thing is--Dak's still a bad QB.
If you look at his time to throw, and his completed air yards, the only players who are worse than him are Cody Kessler, Brock Osweiler and Blake Bortles. Every other QB that takes a long time to throw at least moves the ball downfield.
It's just that when I watch Dak in the pocket, he reminds me so much of Tyrod in Cleveland. The dude waits until after his receivers are already open, and then throws it. That's not NFL-caliber QB play.