Well, for me I loved the episode ^^; was funny in the right places and Rika just makes everything perverted, even watching a train being held together lol
As far as Sena, yeah...I think Kodaka keeps winning points with her too, but I don't think hes ever gonna cash them in at this rate. :P Yozora was classic and I think Sena did deserve that (after all why should she only be able to walk on other people, but not know what it was like :P ) I laughed at the implied yuri themes when Sena blushed when called out
""You actually like being stepped on, don't you?" "Looks like your body's being honest"
Sena's reaction was great