Bones! You didn't think that 3rd and 20 something scramble and rocket to Moss (who promptly dropped it at the sidelines) against Seattle wasn't a potential highlight reel play? Walter threw about a dozen of those last year. He bought time and then made a great throw that was dropped. He also held onto the ball too long and got hammered. Then when Shoop came in, he looked good and bad making quick decisions.
Everything I saw last year said he has all the tools, but plenty of players have had the tools. The question is putting them together. Last year was an advantage for Walter only from the aspect of giving him time to learn the speed of the game. Hopefully, we've got an offense we'll keep around for more than a season so he (and the guys we bring in) can learn and use it.