Tbh the only way to save Night Elf storytelling is for it to stop. Whenever Blizzard writes something for them they manage to kick that race some more. At least when they are ignored things won't keep getting worse.
His cinematic (and in-game) Worgen form lacks the tail though. That he totally always had because it's obviously not something Golden pulled out of her ass due to not paying attention. So, in other words, that's not really Genn. As such it's impossible to say whether actual Genn's Worgen form is awesome or not.
A Gnome in a cinematic like that (i.e. one that doesn't use in-game models) would be an uncanny valley abomination to be honest.