I think it would be better to source outside the forum for a changelog, I don't remember them doing it for 2.0. (If they did please correct me)
However, many players did make it for 2.0, most likely the other versions (German, etc). There is also a cross-server discord where you can ask for any changelog.
I presume you're more worried about the changes made to ninjas? I'll see if I can find something and send it to you via PM.
They did provide official change log, even if not the most detailed, it was still there.
I do remember it being both in one of the official 2.0 threads, and posted separetely in strategy threads too, the former of which would be hard to find, but the latter pops up instantly, and thanks to always helpful Achroma I do not need to post all the links myself : http://forum.naruto.oasgames.com/en/forum.php?mod=viewthread&tid=12147&highlight=skill%2Bchanges