Lord Grievous said:
This latest version has his right eye so dark it seems like he's got a black eye, and that smile (in my opinion) doesn't belong there.
Although this whole thing is now academic, since Ady has said he's happy with this clip and is done with it, I just wanted to reply to this. Regarding the "black eye", yeah, I guess upon comparing both images, the shadow over the Emperor's left eye (our right) does seem more pronounced in the newer clip. However, it's just showing what was already there. Having brightened the image may, therefore, be questionable to some, but it does bring it visually more in line with the other holograms in the saga.
As for the Emperor not smiling...
what movie are you watching? ;)