Fun? Yes
Good idea? Probably not.
I've been part of three WIS beta testing groups and all three were what I would deem a failure.
1) At least half the coaches that sign up don't test, making any results a bit sketchy. Even I can recruit successfully when I'm the only team in the Southeast US paying attention.
2) Testing goes super slow and people are making conclusions on a very small sample size. Understandable, but it would be better to have seble simulate 1,000's of games and do analysis that way.
3) Only a portion of the coaches that do log in provide feedback.
4) With such a small number of coaches providing feedback, major problems can go unnoticed. For example, based on the last HD beta you got to test with your team if you were in the world. Right now that means that there would be very few teams testing fastbreak and zone. In fact, there might not be a single coach that is providing feedback that is testing either so you might end up with a new uber-offense or complete disaster of a defense and nobody really notices.
Now if a lot of people would actually test and provide feedback, it is a good idea. But prior experience suggests that will not happen.