Well, that was fun and all over the place. As pointed out by @mrspidey the mood-swing from Yolanda killing Brainwave to Mike's roadkill of Iceman was whiplash inducing. And so many open questions especially with regards to all the ISA offspring: Cameron, Artemis, Emo Tuba Boy and of course Cindy. Maybe Cindy will rally them around her though I don't think she's much of a team-player (neither are the others).
Not sure I agree with Barbara's retort to Icicle that nobody's gonna die because of the way people think - but I guess being threatened by a maniac super villain on top of a tower might hamper one's philosophical and rhetorical skills.
And yes, it was refreshing to watch a superhero show with no will-they-won't-they nonsense, no triangle of doom, no twu luv. The emotional core was the Courtney-Pat relationship and that worked spectacularly. That and those gorgeous shots of Stargirl and Stripe at the end make me willing to do a lot of handwaving.