Thanks for the new thread!
This episode is was a set up episode for WestAllen. I mean, little hints here and there are showing them coming back together again as best friends but also romance is happening soon... you can feel it in the air.
I just love seeing Iris a regular part of Team Flash now. That's not only awesome in general but another big hint that WestAllen is heading into romantic territory. They are going there so she doesn't suddenly become a part of the team just because she's romantically with Barry. Nah, this stuff is being taken care of now so it's all a smooth transition when WestAllen becomes romantic.