That is true, Greninja vs. Charizard wasn't quite as epic looking as Greninja vs. Sceptile had been, or various other battles from the last few episodes. I thought Goodra vs. Bisharp was better, honestly.
I saw a leak of the final evos like a month or so ago that has been pretty much 99% confirmed to be true. The leakers also correctly revealed a lot of other info that turned out to be true, namely the existence of Pyukumuku and Morelull and the fact that there is no Pokemon League. Also, the leaked art of the starter evolutions featured the Trial Captain Mallow, like two weeks before her official reveal. Have you seen/do you want to see them? Or do you want to remain unspoiled until it's official?