Regards Yuuya and Yui's interactions, I have a
long post on that, so I'll not repeat it here.
I do think that this wall all in all a decent episode, and the director and planners of Total Eclipse have succeeded in their plan, which is to create greater awareness of the Muv-Luv franchise, specifically Alternative.
Don't forget, however, that Yui is going to be in a Takemikazuchi, and she's had more time in that machine than Yuuya has in the Shiranui-1C.