Irozuku sounds pretty interesting; I wonder how I missed that when I made my list for Fall?>>388
I initially passed over Starlight because I assumed it was an idol show. When I did watch it, I enjoyed it, but, I'm not sure what (if anything) it was supposed to mean. It did remind me of Utena, as you said, but it felt more like an homage than something that can stand by itself. It also reminded me a bit of Princess Tutu, probably because of the focus on singing and dancing.
On the whole, I think it's a fun show but fairly forgettable.