That's right, India once had a respawn similar to Iran's and Mexico's as the Marathas. The problem with a triggered spawn was that there was no way of knowing whether the colonial conquerors have already arrived or not.
If they have, the Marathas are annoying because you lose your colonies. If they haven't, the Marathas are usually doomed.
Also, if the Marathas fail, there likely won't be any modern India at all. So for the time being I have decided to have a later Indian respawn out of the British Raj or whatever its equivalent is. I still want to represent the Marathas though, as well as Vijayanagara. It's not very accurate to have only a Muslim civ in India during the early modern era.