You, as an Indian, who do you think be the best option to deblob india?
and what do you think about Ahmadnegar Sultanate?
That's one tough job, but ok let me try
Not just because I am Indian, but as history,Cultural etc enthusiasts I want more representation from both China & India,especially since both of these region have very long & interesting history.
So here is an Idea, since both names India & China in a way r western terms for both of these regions & not self identifiers, civ 7 can drop it & be free from modern national baggage these terms come with. (Moreover it less Eurocentrism

)
Now we have 2 continous civilizations with a mainstream & many substream cultures.
So for China we have a mainstream culture
Zhongguo civ (which is a perfectly valid,historical term, so PRC may not mind such deblobing)
& many substreams which became lost or assimilated like Gauls in Europe.
Yunnan Civs (Dali,Nanzhao)
Manchurian Civ
Xinjiang,Tibet etc.
Similarly for India, a mainstream culture
Aryavarta civ
& substream cultures
Tamilkam civs
Gandhara civ
Ladakh, Assam(Kamarupa) civ
& may be Sindh & Bengal, if one think more one may get something out of Deccan also thou more difficult case.
and what do you think about Ahmadnegar Sultanate?
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Don't think it should be a civ, it looks like drop in a ocean IMO.
The thing is if we go with such drops,then there r crazy amount of them.
One might argue for Malwa Sultanate,Chamanas,Candelas,Sisodiyas,Hyderabad Sult,Pandyas,Pallavas,Maukharis Aulikaras, Pushyabutis, Chalukyas, Satvahnas,Vatakas,Kalchuris,Oudh Sult., & I can go on
So here as an Indian I won't mind if I can get all of them but ofcourse that is not possible & historically sound & run contrary to established (both in game & real) definition of Civ.