Don't forget the lesson we learned from Kargil, where our combat helicopters were not able to fly in such high altitude conditions and could not provide good support to the ground troops.
I only say, if they are cheap and available from next year on, they could be a good gap filler for shrinking IAF squad numbers, till LCA, MMRCA... are fully inducted and gives even special advantages that these couldn't.
Sure, because the allied troops have total air superiority there. The point is Harriers don't need a real air base necessarily, they can land on a normal road, can be re-armed by a small support troop and take off again.
However, like the article confirms IAF don't want them.