Staff of Domination is UNBANNED
Trade Secrets is BANNED
Overall, we're very happy with the current state of Commander. Both of these changes are decisions that have been building momentum for a while rather than urgent issues.
When Staff of Domination was banned, it was one of the most widespread and iconic combo cards in the format. Banning it sent a clear message that turn four wins weren't the gameplay we wanted to see. These days there are plenty of scarier combo cards out there, and Staff of Domination has a valid role as a cool utility card. Neither of these would be enough their own, but together they provide solid reasons to unban the do-anything stick. Please enjoy Staff of Domination responsibly.
Trade Secrets is much like Limited Resources
in that has some issues in a multiplayer environment. It isn't a problem when one player draws four cards and another draws eight. Trade Secrets is a problem when both players decide to draw 80 cards and effectively turn a four-player game into a two-player game. It just doesn't add enough to the format to justify the games that it single-handedly ruins.