I have a hypothesis, albeit with one large assumption that tries to solve this strangeness around IAF mission planning.
They planned a mission without AWACS coverage. This is partially verified by the lack of situational awareness for the pilots. Yesterday's PAF briefing didn't indicate IAF AWACS operating in the area, while they did indicate their own.
Why would they plan a mission without AWACS coverage? Because an AWACS is a high value target and IAF doesn't have many of them.
AWACS are especially vulnerable to long range potshots.
Now here's an apparent contradiction. Why were they willing to expose their fighters into the PL-15 range but not their AWACS?
My guess and the aforementioned large assumption is IAF believed the "AWACS/Tanker killer" propaganda about the PL-15, and thought it wouldn't be effective against maneuverable fighters. They reckoned that if the Rafales, Mirages, Flankers etc were to be engaged PAF J-10s would have to close the distance to use medium range missiles.
This would also explain why IAF fighters were not equipped with Meteors but were equipped with MICAs. They were expecting a fairly close quarter fight and were loaded out accordingly.
I know this is slightly farfetched, but it does explain a few peculiarities - given the limited amount of information we have.