These players can't time the market to the degree they decide when to offer their products to whatever jurisdiction. Prior to that there is a very lengthy and costly legal battle they have to win, and this legal battle can take a few months up to a whole year. Once you are granted the okay of the authorities and regulators, you have to roll out your service in whatever the market situation is at that point.
I think the timing is fairly decent, but the market isn't really interested in Huobi due to how weird they act, and how they are suspected of having government officials on board. And people are far more likely to use the already established true USD exchanges instead of a foreigner. You never know what a Chinese exchange with all political difficulties going on will be doing with your data once verified. No thanks.