I challenge your very notion of "balance". In your future examples, you talk about things like "win war button", but that's a matter of making the game have meaningful decisions, not "balance". You can not and never will "balance" a French start with a Ternate start, it's impossible. The frustration here comes when you make mechanics changes that make Ternate weaker or mechanics that have no historic basis just to protect nations like France extra.
Your patches have systematically deviated further from balance, because they strengthen powerful nations and nerf weak ones.
I agree that balance much worse than say CoP patch or so but they have not been boosting powerful nations at all. In fact I think they are weaker than ever. Since the new patch at least one of the triumvirate of France, Ottomans, and Muscovy gets destroyed in every single one of my games (with lucky nations, etc) with little or no input from me. While England is much stronger than the last few patches (as in they don't collapse in the first 50 years because of religious instability + War of Roses or just get outright conquered by Scotland or even Connaught in one of my games), Austria didn't really change, and Spain was buffed because the Aragon-Portugal alliance destroying them doesn't happen as often. Portugal is still Portugal.
In RotW Aztecs got buffed into Natives CoP tier strength. China destroys itself (which is a problem in itself) and Timurids either collapse or is a glass cannon when the Europeans arrive and try to take parts of India only to not because on paper Tims are strong. Now the Europeans never get into the Hinterland of North America (Brazil though is another story) because they are too scared of the 50k army natives can make because of Federations.
They have hardly been buffed. I think everything has just been nerfed which is a completely different issue than one side being nerfed more or whatnot.