Pretty much all the actors did a terrible job in the prequels. Its not their fault though. Portman can act, Neeson can act, McGregor can act, Diarmid can act alright perhaps Lloyd can't. Christensen can act too.
But in the prequels it was very very bad. The Director has control over that. Lucas fault.
Just a shame someone didn't have a dirty little secret they could hold over George so they wouldn't get fired when they should of told him "your doing it wrong"
Even Yodas backward talking was a bit over the top.
"Around the survivors a perimeter create" WTF
Irvin Kershner at the helm would of been great. Hell, get Spielberg to do it they are friends I doubt Lucas would of sacked him.
I wish I lived in an alternate universe where the prequels were as good as the originals and were heralded as cinema master pieces.
What could of been.