I didn't like Linklater's voice in the promo, but it was a short promo video and not a long sampling with dialogue and what not.
I do think the artwork and designs look great. I'm very intrigued by the sort of retro-noir setting and Batman visually evoking his golden age look when the character first started. I get this isn't strictly a golden age Batman series, but I really like that sort of pulp golden age of comics setting, with the advent of Detective Comics, superhero comics, pulp radio dramas, pulp novels, The Shadow etc. I've wanted like a streaming Shadow TV series or Sandman Mystery Theatre in this style but live-action. This isn't quite that, but I'm hoping it can scratch that itch.
I think it's fine to experiment with Batman now and again, in this case they are taking like a Golden Age era Batman, remixing him with some later concepts and characters.
B:TAS was like a Bronze Age/Modern Age Batman series mixed with a retro noir style.