Technically, Nisha aunty should have been out. She failed in the team task. All kind of blamed Happy on his team management, I think it was just clash of two cooking giants. In my point of view, Nisha aunty should have just helped Devyani when she couldn't do what she was supposed to do. I think Happy as a captain was doing his job coming to everyone. he took care of halwa only when Nisha aunty had to go help someone else.
My two points, the judges had pre-decided that Khoku and Happy would leave this week and so it happened. I don't think any cooking rules applied for this week. These were very abrupt eliminations, not based on repeated failures but may be some little mistakes here or there. Not sure if they are changing the MC platform by bringing in the wild card-