You don't have to be a super accurate passer in the WCO if you have RB's who can get out and catch the ball. Neither McNabb or Vick were accurate passers in the short game. However, both could extend plays with their legs and both could easily flick the ball 60+ yards downfield. Remember the game when McNabb scrambled around for 14 seconds? When McNabb threw that ball, he was on the run and had to throw that ball across his body. He never planted his foot (I just watched the video, I was sick all over again). He threw it from is own 23 and it was caught on our 23. Opportunities like that are inevitably are there for the taking, since defenses can scheme to shut down the short game. Can Dak take them?
The thing is, when not in the shotgun, can Dak effectively run a WCO scheme? Dak would have to become proficient in both 3-step and 5-step drops. The 3-step means get the ball out fast. With the 5-step, there are two basic techniques to learn. One is to take your drop and be set at the end of the drop to release the ball. The other is to make the last step a hitch step forward (step into the pocket), being planted at the hitch and releasing the ball to the proper spot with accuracy. If Dak cannot do that, then he will almost always be running the scheme from the shotgun. This puts a bit more pressure on the o-line, since the rushing linemen already know where the QB is.
Dak can move, we know that. But for an effective WCO, we should have a Westbrook-type who can really catch the ball out of the backfield for at least some downs. We also would need a TE like Kelce/Kittle/Ertz who can catch the ball. If Dak doesn't have the right offensive personnel for the WCO, it simply won't work. Reid's best chance came when he had T.O., since everything opened up for his with that threat. Can Cooper be that threat? Are Zeke and Pollard good enough receivers out of the backfield? Westbrook was a much better route runner then either of our backs. Receivers running the shallow crossing routes must be at the right place at the right time. And, of course, the ball has to be there for them. Can Dak hit them? We already have the running component in Zeke.
If QB's like McNabb and Vick could do it, I believe Dak could too. But the team needs the right personnel around him. There are examples of teams who try WCO-type schemes without the right personnel, and they have failed. I don't want us to fail.