My last visit to the ATC in Delhi still cited shortage of ATCO's
They have a plan to have just four controls over India (delhi, bombay, Calcutta and madras) above FL250
Because of shortage of ATCO's it has only been done for VOMF (Madras FIR) which means for airplanes more direct routing, getting their optimum flight level and done away with Bangalore, Trivandrum, Mangalore and Hyderabad control in VOMF. Which is GREAT!!
Another thing, they aren't able to use all the three runways in Delhi because of shortage of ATCOs...
Like mach5 said,mcheck the website for AAI