My understanding is that Hu basically affirmed the 第二件大事 which was the period between 1949 and 1976 (1979). No mention of Cultural Revolution or verge of economic collpase. Mao Zedong Thought is a theoretical accomplishment. Deng Shiaoping Theory was built on and expanded Mao Zedong Thought.
I have yet to interpret the meaning of inclusion of Mao's 关于若干历史问题的决议 in the speech. I welcome different interpretation of Hu's speech. Please no curse.