Xi Jinping is not likely to do for politics what Deng did for economics --- he seems more like a Brezhnev type. Despite recognizing the fact of stagnation and decline, the Party has chosen to pay only lip service to the need to address official corruption, the need to increase domestic demand to address the widening gap between rich and poor, and the need for more political legitimacy by allowing citizen participation and freedom of debate. No effective measures to address these serious issues are being proposed.
Any significant legal-political change would probably mean that many CCP leaders would not only lose their jobs, but also face prison for "corruption." They know what happened to the Soviet Union Communist Party under Gorbachev and other Communist Parties under reformers and so do not want to follow that path.
The Stalinist system in the world only survives now in North Korea, Cuba, Laos and the PRC. In no country that abandoned its Stalinist system is there support for return to that system.
I feel that if Chinese people feel seriously let down by 18th Congress that the political situation in China could become dangerous. I feel anxious at this prospect.