Devaluing the Yuan has set any hopes of it being a reserve currency back by a decade at least. It was a move of weakness and has accelerated capital outflow from China as well as causing some head scratching about the competence of party leaders, because it seems unduly drastic, unless things are worse than they seem.
What you are saying is true, but won't matter anyway, because switch from USD to SDR won't be a free market decision, it would be forced upon us once US and China agree on that.
