What if Kazakhstan, Turkemnistan, Uzbekistan, Tajikistan and Kyrgyzistan remained ASSR rather than being granted status of SSR in USSR? And Moldova was made ASSR of Ukraine (there was Moldovian ASSR before WW2), and I know Stalin wanted Armenia to become ASSR of Georgian SSR.
How would this affect Soviet politics (internal), how could it affect the collapse of Soviet Union, etc.?
Have fun!