I don't discount the fact India is adding more hardware, but India is adding them at a pace not really at par with China. Now if China is slightly faster, then that isn't a concern, but that is not what's happening here.
Here are the destroyer race, the frigate, submarine and corvette race is frankly even more loopsided.
https://en.wikipedia.org/wiki/Visakhapatnam-class_destroyer
https://en.wikipedia.org/wiki/Type_052D_destroyer
By the time the first Visakhapatnam class is commissioned, at least 10, most likely 11 will be commissioned. This is if it is commissioned in time, which I doubt because if it isn't in sea trial now it is too late for next year, this is true for all nations' first of its class.
Also keep in mind, China has one 055 launched, another close, and two more in the early stages of construction. These are all visually confirmed. Now the 5th and 6th one I am not sure, so I won't included them here.
Though the likelyhood again is at least one 055 will be in service when Visakhaptnam class goes live.
Location is important, I don't discount it, but brute force can change that. What can change it more is location itself. China's Djibouti base means ships would need to travel less distance and would come from at least two directions to face any threat. This is something that cannot be discounted.
The US is far, but as it stands just its troops in Korea and Japan can most likely win a quick and sharp war with China. China is far from IO, but PLAN may not be. Since we are both nuclear powers, it is important to note that nothing would get too out of hand in case of emergency.
Though what is even more realistic is the simple fact China has these assets operating in the IO region in a continuous bases, would swing perception to China's favor and thus allow China to have an even greater say in the region. Think America, it had not needed its military in the Pacific region since WW2, yet it's presence makes sure its voice is heard and its actions followed.
Logistics is a factor, a huge factor and China is working on it. Remember the missing plane? People laughed at China's logistics, but no one has followed up on China's improvements.
https://en.wikipedia.org/wiki/List_of_active_Indian_Navy_ships#Replenishment_ships
https://en.wikipedia.org/wiki/List_..._Self-Defense_Force_ships#Replenishment_ships
https://en.wikipedia.org/wiki/List_of_active_People's_Liberation_Army_Navy_ships#Fleet_replenishment
Chinese replenishment ships almost double India and Japan put together, and then the difference would increase. There are currently no plans for India nor Japan to acquire more in at least the near future.
https://en.wikipedia.org/wiki/List_of_active_People's_Liberation_Army_Navy_ships#Amphibious_warfare_ships
https://en.wikipedia.org/wiki/List_...fense_Force_ships#Helicopter_destroyers_-_DDH
https://en.wikipedia.org/wiki/List_of_active_Indian_Navy_ships#Amphibious_warfare_ships
With China, a 6th 071 has been seen laid, and the 5th one will join the fleet shortly. I will admit Japan does a lot better here, I would include future Chinese plans, but I have no concrete proof and Japan already has all of them in service. I included them as I didn't want to show them as an incompetent force, but they have nothing to do with this discussion.
Now India has pretty much nothing here. I have heard tenders, but these things take better part of a decade in the best of circumstances after a deal had been finalized, so in the near future at least India has no real assault capability.
Now another thing that is overlooked is the combined number of 056 and 054 are 60+, this means China has more than enough ships to deal with most neighbors put together, minus Japan and Korea. So PLAN presence in East and South China sea will not diminish no matter how many capital ships are moved outside the region.
These are all facts on Chinese logistics.
Don't get me wrong, I love Pakistan and would see it as an attractive destination for investment, but the overwhelming number of dollars involved really says it all about Pakistan's place in Chinese eyes.
Now I just outlined my thoughts on Indian ocean logistics, but the key missing component is the stationing of anti sub and ELEN aircrafts, as well as China's lack of effective carrier force. Though China is working on both.
https://defence.pk/pdf/threads/plaaf-planaf-special-mission-aircraft-y-8gx-family.465649/page-2
There is a lot of good information on Chinese developments in this area in this thread, check it out. As to carriers, I don't need to tell you how that's going. It's good, but not great. Though at this point in time good places China comfortably in second place. Though well behind first.
Himalayas is a different beast. This is naval thread so I'll hold off. Now if you want we could discuss. It revolves around indigenous engines (yes it will be great, one day.), Y-20, Y-9, Z-8, Z-20. A side note, it has been officially confirmed the first (known) Chinese combat aviation brigade has been formed. One of the only non Western + Russian + Japanese( maybe Korean) formed. (please someone dispute this, I have no concrete information on this, but fail to see who else would have so many helicopters to field such a force.)