In real life, there are just a handful of teams that run predominantly zone with major success at the top DI level. Now, this is a game and real life is not a complete answer, but it is a starting point.
We know Cuse runs zone. We know about the old Temple matchup zone. How many other teams are known for zone?
Now, lots of teams will switch to zone in certain game situations - but that isnt the same
A lot of what is said in this thread is valid - it would be nice to make zone more useable at the top levels. It already IS useable if you study it carefully and recruit right. It can be made better
BUT, this isnt on my top five list of things I hope WIS works on.