I disagree, but there's no surprise there. Although this ain't the place to discuss that, so back to the matter at hand:
The Lich King encounter was a vast disappointment, because his way of combat was very bland and boring. He weren't actively endangering the heroes, instead merely implimenting indirect fatal danger.
This suggest that the Lich King in combat is pretty easy to overcome. My previous debating in favor of the Lich King was much based on his ability to phase-shift and abilities of similar nature, but he doesn't appear overly interested in implimenting such for combat.