I see your point... you have to shuffle batting order sometimes depending on the situation. However at the same time, there are certain positions that shouldn't be switched. For instance, Aiden Markram should ALWAYS be opening the batting with QDK. His numbers at No.2 are quite impressive. Avg: 38, SR 172. So why is he batting at 3 in one game, 4 in the other? Similarly Ferreria is not someone you can send in the middle. He is a very specialized player who plays the finisher role and doesn't have the technique to bat in the middle-overs. Brevis, Miller, Stubbs you can switch around depending on the situation. They should have greater clarity about these things.
Varun.. tbh most teams has an issue against him so I wouldn't be too bothered about that. The disappointing thing for them is giving him those two wickets off two balls, which was just not needed. They managed to score alot of runs off him but him getting 4 wickets meant those 50+ runs didn't mean much, because the damage he did with those four wickets was far greater