I like the cast, but Thomas Gibson is not the voice I think of when considering Deathstroke. J.G. Hertzler is more like it.
Morena Baccarin also sounds too North American in Talia's role. I've always thought Talia would have a hint of an accent, possibly MidEast or Eastern European. But Morena's a good actress, so I look forward to the voice performance otherwise.