They probably are messing with us at this point. Like how they said the AI would be less dumb as you use them over time. They're still just as stupid at mastery levels 4/5 as they were at 1, all those do is up their stats.

I still haven't completed Copperbell HM because the squadron is too dumb to handle basic mechanics. I gave up on it. The Vault is going to be worse than DF bads unless you go on healer. The squadron healer can't even heal properly in Halatali, and now they're throwing them into one of the biggest healer checks in the game. That's a recipe for disaster.