Seems that no one, including the OP, has actually made any suggestions here's 3 to start off with.
1. Abolishing the ban on political parties. China is large, it's clear that grass roots concerns are ignored and the ability to champion these would be of huge benefit to the people.
2. Reform of the Hukou system. That so many provinces and cities rely on migrants for their industrial needs yet these people are denied access to medical cover, children's education, etc is crazy. The government knows this has to change particularly when it's own policies favor the creation of super cities.
3. The increase of the poverty line to a realistic level. Last time I checked the line was set at RMB1,147 per annum. There was talk of slight tuning to this figure in recent months but considering China's current economic status as well as factors such as inflation this also needs a serious overhaul to reflect today's situation.
That's about it for now, but would be interested to hear others.