Cad Bane looks 100x more creepy and menacing in live action. Yeah, the mouth is higher and the voice is slightly different, but it works better. His animated form never gave me the slight sensation of terror seeing his face now does. When he lifted his head and we saw his eyes, and the characters looked at him like "what the fuck" - I felt that. Scary vibes through the roof.
Luke was great this ep as well. Felt like seeing a real immediate sequel to RotJ, if only for ten minutes. (I'm not dunking on the ST, at least not at the moment - I just mean seeing Prime Luke again)
It's Star Wars, so of course some people will be SUPER pissed no matter what is done, whether there is "fan service" or none, but personally I love how Mando and BoB are giving fans what they want and telling compelling stories at the same time. It's my cup of tea, I guess.