User blog comment:Bigez620/"Blast From the Past" - Mini-Review/@comment-1376932-20140711050715/@comment-27329394-20140712015950

Samey developed plenty on her time on the show...

Amy and Rodney only appeared in 4 episodes which isn't really enough time to develop. Rodney was also comic relief, and typically comic relief characters don't get all that much development compared to the others. Max is also comic relief and by extension doesn't get as much development.

Sky and Dave, on the other hand, are not comic relief characters and are going to appear in at least half the episodes (at least 7/13 thanks to the next episode), so it is understandable that any lack of development will be more noticeable with them. I don't dislike them, but a very large part of their character thus far really is focused around their relationship, especially when compared to Shawn and especially Jasmine.

Finally, sibling rivalry between Jose and Alejandro was shown, but the difference here is that Amy is a contestant whereas Jose appeared for 2 minutes.