I don't know enough about India's cricket structure to comment on their squad selections, but it was a good win. A much-needed win for them. If Australia whitewashed India and won the first T20I, I bet you they'd end up losing sales due to the "close games" they promised. Not being rude though, still a very good win for India. Makes the tour a hell of a lot more interesting.
One thing I've noticed, India played 3 spinners over the course of the series, Chahal, Jadeja, and Kuldeep. None of them did anything notable.
Jadeja has a tendency to bang a short ball down the leg-side every time he gets smacked for a six. He actually changes his stance when delivering that ball, puts no spin on it, and just darts it onto the pitch. I've noticed that throughout the series. To put a quick delivery, it has to be full and straight on the pads, otherwise, it's a "hit-me ball".
I rate Chahal highly, but he should have done better in this series. The length was too full or too short, and he was getting some decent turn from the pitch as well.
Kuldeep got some pretty good turn, but it's the speed of the delivery that makes him easy to smash sometimes.
As for the fast-bowlers, today they showed something good. Thakur did well to get some swing, and bowled intelligent lines at times. Bumrah made up for his loss of form but still must carry on in the T20I series. Natarajan did decently on debut in new conditions, rate him higher than Saini.