the drooped nose is pointing to its naval application. They have also retained the two spill ducts near the leading edge coming from LCA Tejas, seems they are serving their purpose well on Tejas.
This is from aero india 2013 seminar, presenter Mr Shyam Chetty, Director, NAL, CSIR. He said that they will be shortly testing the NLCA on the sea based ramp test facility.
Yes, very high altitude and very low temperature performances of Tejas is being tested at Leh. AT high altitudes, the air is very thin that means longer takeoff runway is required and also there is a reduction in take off weight. You can compare the takeoff runway of LCA in Leh trials with lets...
because ISRO has mastery of rocket engine design not jet engine design.
A rocket engine
A jet engine
you can read the difference between the two here Aerospaceweb.org | Ask Us - Jets and Rockets
We also need large number of underground silos of Shourya missile all along the Indo-china border. The missile can be used to target strategic military bases, logistics depots/chains of CPC army in tibet. Agni 5 will take care of CPC mainland.