i have noticed in single game matches in play mode and in competitive matchmaking that the handsmoothing and matchmaking is styled like there is going to be a second match. its hard to explain but it seems as though the first match is allowing the player who goes first an unfair advantage to allow for more streamlined 2/3 matches to provide the second player a chance to win out of the remaining two games. this seems to undermine and allow unfair situations when decks are designed to exploit the arena handsmoothing and matchmaking mechanics in my opinion.