Follow-up to this, from the development team:

"We asked for your feedback, and you gave it.

First things first, we’re going to be rolling back the proposed changes to our Constructed and Competitive Constructed Events. Rewards will be the same as they were before for these events. While we still intend to make changes to these two events at a later date to address concerns over the amount of new players entering them with the tutorial decks, we clearly missed the mark with this iteration. So it’s back to the drawing board for us.

As we announced earlier on Twitter, we’ve delayed today’s maintenance so we can roll back this change. Everything else that’s been announced is still planned to go live, and we’ll update you with the new maintenance time once it’s available."