His general tone during the scene was not to aggressively attack. He insisted that they stick to his plan throughout the whole thing, saying he underestimated his enemies, which Dany immediately calls him out on. His plan is so obviously bad and not working, but he wanted them to stick to it, if he had his way, they would not have flown to attack the loot train.
It reads more like wishful thinking. I recall people saying Arya getting stabbed by the Waif was a fake out, and she wasn't bleeding out and begging for help around the city sincerely and that it was all a plan.
Arya learned how to be stealthy and how to kill people, she didn't get any smarter.