I can't believe I am defending these people and am not arguing this is the case, but a change in the multiplier isn't necessarily a downgrade if the value of X has increased. Yes, relative to Pro the new tier isn't as valuable, but it could still be more valuable relative to the old tier for the same price.
I'm saying we don't know what x is for Pro usage. If Pro's newX is 3 times oldX, new10x > old20x.
That aside, all of the ambiguity around usage is killing their credibility (among other things). Usage limits feel like they swing wildly day to day and week to week, and it's hard to trust any of the other claims they make when that's the case.
