I have also had quite a few badges "retire" on me, as well. And i hope Sal changes his mind about those Masteries.

1. Közösség
2. Feature Requests and General Site Feedback
3. Retain some of the very useful features of Missions

I don't think that they should do all of these upgrades. I've used Khan for four years, and I've seen a lot of upgrades that I agree with. But I don't think that they should get rid of the missions. 

1. Közösség
2. Feature Requests and General Site Feedback
3. Retain some of the very useful features of Missions