Definitely it wasn't. And that's why we continued to see bad fundamentals rear their head throughout the year, including on the infamous punt unit. I'm sure Key made minor fixes but mostly he did what he could with what he had, which turned out to be much more than what CGC was able to do.
The question is whether Key can put together a staff that improves on what Collins was able to do in the offseason, which is where you're really able to work on fundamentals. It's his question mark, and it is a big one.