Anvilicious: The film's view of revenge is blatantly one-sided to the point of being cliché and fails to consider that sometimes, it's justified.
Some Anvils Need to Be Dropped: That being said, not wasting your life hell-bent on revenge to the exclusion of everything else all for a loved one who wouldn't appreciate you sinking to such depths, is a pretty good point to make.
A lot of this comes from just how loyal it is to the rules of the series. Everything from how one becomes an Immortal, to The Buzz when they near another, to rules like holy ground being sacred and only one to a fight, are all strictly honored by the filmmakers. Not to mention the animated medium really showing just how far removed from mortals Immortals are for the very first time.
Spiritual Successor: A better animated format of the Highlander franchise than Highlander: The Animated Series.