I have some doubts about GHATAK achieving supercruise with the Kaveri engine. Other than that, the major change I see in the requirement is the emphasis on high manoeuvrability. Most of the other technologies could potentially be borrowed or adapted from the AMCA programme. For high manoeuvrability, we could consider 2D thrust vectoring or the requirement could be split into two variants, one with a canard and V-tail configuration optimized for manoeuvrability, and another tailless configuration optimized for surveillance and EW.
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