Look, we are jumping the gun. The PLAN is massive, true, its numbers hugely surpass ours, yes. But the question remains, can they effectively deploy into the IOR?
Largely, the answer remains no. In any potentially hostile situation, China will keep most of its assets in the Pacific, to counter possible moves by Japan-US-Australia. They don't have enough ships and aircraft to both safeguard the SCS and move into the IOR to protect the SLOCs.
The IN, on the other hand, can easily move afield, interdict and sieze/destroy supplies headed from Africa to China on the high seas (near Madagascar and near Aden) while maintaining 24x7 vigil on the Malacca, Lombok and Sunda Straits.
The PLAN subs are a source of concern but given the fact that the USN P-8As and IN P-8Is can track them continuously from Singapore to Karachi, maybe not too big a concern.
And do not forget that we have subs that can range into the SCS too, harass Chinese shipping and warships.
We will most likely not be seeing any PLAN CBG in the Indian Ocean anytime. They just can't get here. How will they cross the Malacca? Or even Lombok and Sunda straits.
It'll be too easy to send in a Su-30MKI squadron armed with Brahmos-A... bye bye chinese flattop.