What happens if it´s Dupleix who wins Plassey and Buxar?
Well, at the time of Plassey, It had already been 3 years since Dupleix had been stupidly/suicidally fired by the french government and the board of the french EIC.
But the point is that if he had not been fired, he would have continued his policy that Clive and the british did copycat almost unchanged.