I think the FOCCUS test has it's place, but I agree that for some it's unnecessary. We got married a week and a half ago, and so we recently took the test. Well, we had been dating for almost 6 years, and we talk a lot, so we knew the answers to everything. In fact, our foccus couple didn't even want to meet with us a second time since we did so well.
However, for my sister (non-Catholic) who is recently divorced, I saw how that would have been a great tool for her prior to their marriage. It would have opened a lot of issues that they hadn't talked about.
So really, I think there should be more consideration taken into account like how long you've dated and just asking whether or not you've actually talked about the issues.
Personally, I see NFP as a bigger issue with people, so I wish more people talked about that. It also would have been nice to learn more about Love Languages and how to show each other that you care in a way that will make sense to your spouse.