Yeah, definitely, but you also have to be right and be flexible. I mean, there are times when the Patriots have tried a plan and have failed fairly dramatically. The Titans game last year is a good example. They just kept trying to jam the same round peg in the square hole and it wasn't working. The good news is that they aren't wrong that often. And, I think fairly importantly, they don't do it halfway. They don't say, "hmm, we'll try this maybe." They go for it. They remain flexible for sure. But you can't go into a game saying "let's play upwards of 20 snaps (or whatever it was) in a cover zero look" and not be all in. You have to use your practice days for it to the exclusion of other stuff.
We're fortunate because we have a coach that has so much security that he can be as unconventional as he wants -- and also that he has created an onto Cincinnati mentality so that if it doesn't work it doesn't fester, even when it happens in a Super Bowl! There aren't many other coaches with the freedom to go all in on something like this.
Cover zero is exceptionally risky. Anderson, Crowder and Thomas aren't Jerry Rice, but they are good receivers. Bell is practically a wide receiver if you line him up right. No matter how good your corners are, NFL receivers just need one step to beat you when you're on an island and blown cover zero means 70 yards right down the middle of the field. It's not for the Jason Garretts and Mike Vrabels of the world.