Would make interesting listening at times I assure you.
By and large the controllers in India do a quite a good job. Where some of them don't do themselves any favours is when they talk too fast and having to repeat themselves. Another reason the frequencies are clogged up is pilots insist on calling in and requesting, in some cases demanding level changes etc., when the controllers are busy. In my time down there I was for ever asking F/O's to wait a reasonable period for the controller to get back to us for a level change or whatever.