Yeah, because the new weapons are pretty hard to use. You need to either hide really well or to eat the sandvitch after EVERYBODY on the other team is dead. You can't just down it whenever you want. the KGB is pretty crap too. 5 seconds of Crit would be good for just about every other character but that is about just long enough to start Sasha spinning up and you might get one second of it in. Its only good when you are planning to just whale on the opponent and stack crit seconds, maybe 3 hits for 15 seconds.
And Natasha is really lame, to be honest. It looks boring and is ineffective against everything that the Heavy has a hard time with. Oh god, it kills scouts! Really? Sasha kills scouts in less than a quarter of a second. Natasha is only good against stupid pyros.
The pyro update was insane because EVERY weapon they got was awesome and practical in almost every situation and against everyone (except other pyros obviously).
GGs though, I fell in love with Pyro today. BURN EVERYTHING