The Wildcat is an interesting formation and is quite useful if you have the personnel to run it. There were times I thought we were using it as a crutch, but that may have had more to do with the fact that we had a new OL and weren't getting the push up front we needed.
The thing I found annoying during the year was the commentators/writers with their "so & so looks like they've figured out the Wildcat." It's not about figuring it out, it's about using it at the right time and in the right circumstances (like a 2-minute offense) to create more favorable matchups for your team. Every coach in the league knows how to stop the Wildcat, it just depends on if they have the personnel, either in the game at the time or at all, to match up well against it.
In moderation and when sensibly applied, I hope it stays. If Henne takes over at some point, all bets are off. I'd have to see him try to run it before I knew whether or not I wanted to keep it in the playbook.