Specific Set Casual Play

Idea Description:
MTG Arena should introduce a set-based casual matchmaking mode to allow players to test decks built primarily from a single set, such as Aetherdrift, without facing fully optimized meta decks.

Problem:
The current matchmaking system in Play Mode still uses hidden MMR, causing high-volume players to face competitive opponents even when testing fun or experimental decks.
Players often feel forced to intentionally lose matches to lower MMR for a more balanced casual experience, which is not fun or engaging.
Solution:
Implement a matchmaking filter where players can only queue if their deck contains at least 80% cards from a specific set (e.g., Aetherdrift).
This would create a level playing field where players experimenting with new set mechanics are matched against others doing the same.
The queue could be temporary (e.g., for the first 1–2 months after a set's release) or permanent as an alternative play mode.
Why This Would Improve Arena:
Encourages deck brewing without punishing players with high-MMR matchmaking.
Allows players to enjoy themed battles based on set mechanics, making new releases feel more immersive.
Provides a true casual play mode where players aren’t forced to optimize their decks just to compete.
This would enhance the fun factor for casual and dedicated players alike while fostering creative deck-building in a lower-stakes environment.