I don't think it is 100% possible to predict what one might do with power. That is why we say to test a man's character give him power.
Raila would try socialism - free education, healthcare, etc - welfare and entitlements. Raila is liberal to the core even socially. So expect abortion, gay rights and such. I don't see big axe to grind with Gema or RV - his enemies Moi and Kibaki are already senile. Instead he would be faced with more formidable ones - economic reality of capitalism, the church, cartels.
Raila seeks to undo the system. The opposite of say Ruto who has mastered it.