I never considered monsters being able to cast from a greater distance than players, or monsters hitting me with 1 second delay (maybe because they can cast multiple spells at the same time) a bug or an error.
I am convinced that some monsters have greater magical power than us players (yes, monsters CAN be stronger, even if you have uber equipment), and thus have the ability to cast from twice the distance, cast faster, and cast two spells at a time.
Isn't monster hunting MEANT to be challenging???
And hey, do you really expect evil creatures from the depth of a horrifying dungeon to behave FAIR??? *laughs*
Oh, I forgot, most people like to play UO like it was a single player game ("soloing" in UO slang). As UO wasn't meant to be such a game in the first place, I guess there's no need to complain about monsters that require a certain team work.
(Hmmm... even I can kill a Lich Lord by myself when I'm careful, and I don't consider my character one of the top fighting characters.)
Sometimes I wonder if some people like to complain about things in the game, just for the sake of complaining.