IMHO they are all too old here apart from Damian and Duke. Don't know about the BB characters, don't care.
With Kate, well her eyes are the wrong color here anyway, but her age is completely inconsistent in the comics cannon - so it kinda doesn't matter. She's jumped around from 32 to 27 to 40ish, and still gets drawn as looking like a 20-something regardless.
I feel like Steph should be older than Cass.
Though making Babs two years older than Dick seems to be acknowledging the older comics.