So I'm researching India for RoS, and I'd like to add just that I don't really buy PRC making the leap that was made from the victory. I don't see why the other rajputanas wouldn't just assume his constitutional talk was false. Still be interesting to see what develops. That kind of thing was so rare in Indian history. I guess you kind of explained it by alluding to the Vedas but I just find it really unlikely. That and the Mongol situation.
More generally: socially, the Caste System was flexible throughout the first millennium. It was the Muslim conquests that actually made it become more conservative and stratified. Not that it wasn't that way before, but you could actually move up a caste. So with the Muslims repulsed it's probably going to remain more permissive. It's still not going to be great. The caste will usually come with them (from what I gather, before the Ghaznavids you could actually change caste on very rare occasions) but they CAN move a step up. That and modern Kerala from what I understand, is actually one of the lesser socially stratified regions because of the diversity.
Finally, I thought Hindu princes or something weren't allowed to sail on the water or something?