India is not attractive compared to ASEAN.
ASEAN has proximity to East Asia' manufacturing chain.
Way better infra and educated labour with discipline and work ethics.
As far as I see, most labour intensive factories which move away from costal China, they either go to interior of China or to ASEAN countries. Cheap labour is not and alway not the first consideration, how much u can get from labour is. If u pay $200 per month for an Indian worker with only 1/4 of productivity of a worker from Thailand, why should u move there? Plus, u have to consider the abysmal infra and commerce-unfriendly environment. Most companies which take in part in the so-called Make-in-India are only eying their domestic market as opposed to the world market.
Bro, it just wont be practical to maintain the large manufacturing operations in China due to the cost of Chinese labor now. Chinese GDP per capital is now reaching over $7500.
I agree with you that ASEAN is receiving most of the restructuring investments. But so is also India, Bangladesh, Sri Lanka. Even robotics won't solve China's issue due to the shear cost. That's one of the reasons why Japan (which is a master of robotic-based mass production) has preferred to offshore manufacturing abroad due to the cost of labor (man and robotics).
In the end, bro, its just all about $$$$.