Romo's problem was that in big games, in big moments, he froze. When there was no pressure, you couldn't find a better QB. Playing QB is all about dealing with being a QB. It's not about the big arm, or the accuracy, or the aggressiveness or any of that stuff, it's about the accumulation of all that I mentioned. There have been countless QBs who did not possess a big arm, or supreme accuracy, or scrambling ability, or able to read defenses like a book, and did not make it to the bowl. It takes more than that to make it there.
You look at Philly... Foles is just different than Wentz. He has something that Wentz doesn't have, and that's how he won the Super Bowl. Wentz is the poster boy for how you're supposed to look, big arm, accurate (most times) can read defenses (most times) can scramble and run, but Foles just has IT.