@SEO1 You're right, they don't have to listen to anyone because they have all the data (or will have it) that they need to make a decision. There is really no way to test something like an algorithm globally without going live with it (not if you want accurate results) which is why they have to tweak their algorithms constantly. They've tweaked and even rolled back algorithms in the past. There is only one reason above all for the algorithm change, and that is to make Google more money or to position things so that they eventually make more money. It's always about the bottom line.
@Those who are saying that Social Blade is showing even bigger partners with stagnant or decreasing numbers, if that's truly the case then that would mean that viewership is down site-wide, which would be good news to those negatively affected because it would mean at the very least a major tweak and possibly a rollback. I'm not just throwing these phrases around either, I have received emails from people who interact with Google engineers and have seen emails where the engineer has said 'well, if it seems like it's working we'll tweak it to improve it, and if it isn't having the desired effect then we'll shelve it, roll it back and start over.'
So if everyone is really doing badly, then there is nothing to worry about. I would check on those new tv-style content channels, and see how they are doing since the change.