Yes, but I think they'll lose subs no matter what because you can't please everyone. They're doing the calculations, and trying to find the way that retains the most players. Retaining ALL players will be impossible by definition.
That's not to say there isn't room for improvement, of course. Nothing says they've found the perfect solution, far from it. In fact, I think that much of BFA's attempts at player retention has backfired spectacularly. We'll have to see how SL handles it.