Kill la Kill is a coming of age story in a way similar to most shonen, but the main character is a girl, so she has to deal with what most girls have to deal with- people judging her for her looks rather than her actions. The fanservicey transformations - which while admittedly having no need to be nearly so fanservicey - is a metaphor for puberty. As you get older you get "stronger" mentally, but your body also goes through changes and exposes you more as an adult woman and not a child.
I'm not gonna claim it's DEEP, but the fanservice actually has a reason other than humor or tickling dicks.
ON TOPIC, holy shit you're right OP. That's... pretty cool.
