I thought I recognised the voice of Darth Bane, but it was still a nice surprise to see in the credits that it was none other than Mark Hamill! A nice bit of symmetry there.
I also liked the design for Bane himself
as he looks very Vader-like, giving some retroactive significance to the look of Vader's iconic armour and helmet. Personally I never cared for the EU design. Looked a little too ornate for my taste and the helmet looked like a lump of coral growing out of his head.
Indeed, there's nothing about the Yoda arc I didn't like. They even gave some much needed context to the midichlorians.