The effects were even more stunning the second time, and Tarkin was even more convincing (although his voice didn’t sound at all like Cushing’s to me).
Agree. Regardless of how accurate it looks visually, the vocal performance is distracting from someone familiar with Cushing’s voice from the Hammer films. I have a feeling they didn’t ask the actor to explicitly mimic Cushing because they weren’t 100% sure they would go through with the motion capture. Either that, or the actor is simply not that familiar with how Cushing sounds…