While I like the actor, Robert Foxworth (and his DS9 role was really good), here it was an utter train wreck of a performance. As someone who is supposed to be Vulcan, enough so to fool the planet, its quite possible the worst performance for a fairly large guest role of any Vulcan ever done on ENterprise. HE shouldn't have been able to climb the ranks of the High Command. That single performance ruined my perception of the Vulcan High Command. It was laughable bad. Seriously either a producer or the director should have been dialing back that performance. This is one of the times it shouldn't go to eleven.
The first part of that arc was really well done though, its after that it falls apart.