Although I don't say that this won't happen... I think the analysis is a little bit too simple. From what I see, you have just doubled the curation rewards and taken a third from the author rewards. Yes, definitely in the short term this is what will happen... but there will be a new equilibrium point for the system to settle into. I'm not saying that end point will be like this or not, but I don't think it is quite correct to assume the start and end conditions and assumptions to be exactly the same... I think two states will be different. ...

... but that isn't to say that it will be better... just different!