The statistics symbol after your name opens your own statistics: lifetime, Ranked season and lifetime, Quick Games, Local and games against friends.
Other changes
Statistics page: tap the symbol after your name on the profile plate. Your name still opens your account.
Six tabs: Lifetime, Season (Ranked this season), Ranked, Quick Games, Local and Friends. Each shows games, wins, win rate, best and current win streak, losses, draws, games given up, average turns and time.
Below: your decks and the decks you played against, each with games and win rate, and your last games. Ranked also shows your rating and your best rating.
From now on every game remembers how it was played. Older online games count as Quick Games.