Not a bad idea. We put together a simple poll interface a while back—you may or may not have been around for the "which island to sink" poll—and we do have some plans to use it to collect other data, but they've been kind of on the back burner.
I've actually been thinking about various information we want to collect on the War Island, particularly since I want to evaluate its balance once it's finished running. I think there are a number of questions we should ask all those who participated in the War Island once one realm wins, whether they made it to that point or not.