Seeing Jeetland deal with Super Mutants, FEV as well as China would be fun
Jesus fucking christ. FO3 was already bad enough dragging FEV and supermutants to the east, but reusing that all the way in india would just be stupid. Even if we forget that FEV was the product of top secret research that didn't spread out of mariposa before the bombs fell. Just how boring do you want the world to be. West coast? Supermutants, east coast? supermutants, other side of the worlds? Super mutants.
If you want to do it right, just start from the beginning. FO is a series that imagines a retrofuturistic vision from the 50s. They thought medicine was going places, with drugs that make you smart or strong. Computers would be everywhere too. But they would be the computers of the 50s, mainframes with CRT terminals. Because it is hard to imagine LCD screens if all you know are CRTs. To make FO: pajeet good, you have to do research on what an american in 1950 would think india in 20XX would look like. For example. China would expand (as they were the aggressor in FO1 and started the nuclear exchange) and try to conquer india. India would dump all their chemicals and nuclear waste into the ganges to create a giant moat. The result would be a giant no-mans land filled with mutated horrors made from human remains being cooked in radiactive chemical waste. The surrounding lands would have people gun down the horrors that crawl out of this toxic soup. The south of india could be industrial blighted land. They were the competition of red china as the factory of the world, but as the natural resources ran out their factories rusted away. Maybe they think that the nuclear war was vishna returning to the world, and hindu priests have a lot more influence now. You'd have a world of jeets squatting in dead factories ruled over by priest-kings that fight for scraps. All while the ganges spits out horrors.
You could be playing the second generation of colonial rear guard. Sent to reincorperate india into the commonwealth to serve as cannonfodder in the coming war. But you are left with no directions as communication with GB was lost shortly after the nukes dropped.