I enjoyed it. I think they have to be relatively short games - I don't think a large AW game would be as popular, for instance, because it would take a long time and would stand very little chance of winning.
If the Hall were expanded to show variants, that would be very interesting... but would also require a lot of work to analyze the games already there.
The 100K variants where you restrict the number of cities so you have to get 20K per city might be interesting - on the higher levels, that would be a serious challenge, too.