I know a lot of people will struggle with this change initially. Hopefully it will be good in the long term, but as with all change there is a short-term impact as well.
This update will be one people most likely won't like, but once leaderboards are rolled out (in the next update), hopefully, everyone will see the value.
I hope the leaderboards don't take to long to roll out. Keep the interim complaining to a minimum. 😉
I think gameplay will improve, but the game rewards will be lower for those stuck in the lower levels and that's what will be the bugbear for many. Having said that, potentially it could balance out if you're on a more level playing field, because you'll be able to get more wins, therefore more DEC earnings, if you're not constantly battling people with way stronger decks.