I honestly thought the episode was done well for the material it was covering. Not every episode has to have great animation, the only thing I ask for is that key episodes and fights be animated well (and Toei seems to handle that in a very bi-polar matter using all their good animators on Precure, Digimon, and Saint Seiya while throwing us a bone with this show now and then). The Robin's breasts thing wasn't that distracting but I find it curious the flashback had her tan since I thought her lighter skin tone was a coloring retcon to be more in line with the manga. Then again since Robin was in a place with winter like weather during the Separation arc I guess we could attribute it to her location.
O-chan