Hello,
We're working on some changes on the matchmaking algorithm for PvP. Both ELO Rating and Deck Value are now used to find an opponent. Higher your rating, your deck value will be less important.
We're monitoring these changes during the weekend and we are working on a complete "revamp" of the PvP system as the "new big feature" after this Expansion.
Let us know if you notice any difference in your matches.
Regards,