I am a bit apprehensive about this news. All this talk of of NATO sharing BMD tech has been in news for quite a while, but nothing much substantial has happened between India and NATO on this front to take the process forward. I don't the current government has what it takes to make this thing a reality in the first place.
Anyway, as long as our own independent AAD programs continue without any interference, then this is okay, but not at the cost of our own indigenous programs suffering due to this. Having a NATO BMD shield will mean that we are totally dependent on them for our security, not something good at all for us. Also, this shield is more inclined towards protection of Western assets from Iran, NK and primarily China. Our primary requirements are to use our BMD systems for protection against Pakistani and Chinese missiles. And Pakistan is a major NATO ally, so all this complicates the situation for us. Not sure how it will work in our case. Also, I believe that our Agni and Prithvi interceptor missiles are much better that PAC-3 of the Americans.