look, I have a thing for unlikeable characters, and even I don't like him. I mean, I could see how he'd be a fun and interesting, if he wasn't such a little Mary Sue. Like, if he was Talia's cousin or nephew or something--her apprentice, even--that she dropped on Bruce to learn detective skills or how not to be a douchebag or something, then I would probably like the character a bit more. It's this omgbruce'slonglostson! thing screams badfic to me. I also don't feel like he's being written as a scarily-precocious child so much as a teenager who's nominally a kid, and I think even scarily-precocious is too Sueish when dealing with a long-lost assassin-trained son of Batman and Talia Al-Ghul. Plus, he hasn't interacted in a meaningful way with any of the characters, especially the characters it'd be most interesting to have him interact with--Cass, most obviously, and Helena.