The think that frustrates me the most is that is has been swept under the rug for so long. I'm sure that many of the Chinese swimmers are clean, and the progression shown by Chinese swimming/swimmers is not improbable, but now that this has happened the perception of many swimmers may have been tarnished (unfairly or not).
The fact that it took 3 years for this information to come out indicates some dodgy business going on, and the consequences could be dire and should hopefully stir some debate into large scale doping in sport, where I feel the focus has been on Russia for too long.