It's not just your everyday Orcs that become too easy. My characters have played all the way through Tales and we're almost done with Darknening. They've each received really strong magical weapons and armor.
They now are able to (quite easily) slay Dragons, they just killed the Werewolf of Mirkwood, and then they polished off one of the toughest Nazgul!
Which is fine, as they've earned those things after decades of adventuring. But you're right, it makes it so that it's almost a "ho, hum" when they run into just an 'ordinary' group of Orcs or Spiders!
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