With the 9.6 update, most tank destroyers and light tanks will experience significant changes in their parameters. These changes will result in TD’s becoming more team dependent and the light tanks increasing in relevance on the battlefield. (read, nerfed view range). Also dispersion within the aiming circle will be increased on many / all ? tanks. ( Read, more RNG, less getting your crew killed 3 times in a row)  Further it brings 2 new Premium vehicles: the French Tier VIII medium tank, AMX CDC, and the the Japanese Tier VIII medium tank, STA-2.

Some youtube channels to check for more detailed info on the new tanks and changes:

Jingles, Quickybaby,