In fact, being between regions is very important for the statistical study, because your analysis will only be valid in China and cannot be interpolated to other regions of the world! (but I like the variety of elo, some people only analyze the highs elos and that also limits the statistical study!), Believe it or not, there are many styles of play between regions, the fact that there are videos and guides in different languages influences a lot in the paradigm!
More than nerfed, I would say that it was “Balanced”, that is, changes were applied to weaken certain aspects and also strengthen others, I have a post compiling most of the changes, imo China received the same amount of nerfs as buffs, so we can say that its potency is still high.
I apologize, I’ve been quite busy lately and I receive many notifications every day, sometimes I simply forget to reply to messages, much more if these are not direct answers or posts that I follow very closely xD