If the Chinese can stop another bubble from happening, I'm all for it. Bubbles always hurt the underlying economy and benefit only a lucky few. The OP sounds like he thinks that the idea of stopping a bubble is something to worry about, but I disagree. Stability is better for Bitcoin and the underlying economy.
With that said, I seriously that three Chinese exchanges can control the market to that extreme. I hope I'm wrong. Bubbles are never good because they always burst.