IIRC his main proposed reform in cannon MT was the transformation of all planetary governments into democracies (GOV 4; I don't recall him stating the method with which he intended to do so) and Imperial involvement in local affairs to the benefit of the population. To that I'd add the formation of a "House of Commons" (one representative per subsector?) alongside the Moot, and certain anti-trust laws effecting the megacorps. I don't know if a big noble as himself would have both the vision and the courage to initiate something serious about the landed nobles' estates, atleast at the beginning of his plans (even with monetary compensation), but the masses WILL probably take the initiative in this matter. Just imagine his emotional state when a big landed noble's estate will be nationalized by a democratic planetary government under public pressure - on one hand, this is exactly the kind of planetary government he wished for (receptive to the people's wishes on one hand and not afraid of the nobility on the other hand), but, on the other hand, he will start to realize the magnitude of the change underway - far, far beyond his plan.