If you're going to make something "hard", I want it to be hard as in I actually have to strategize. Hard as in puzzles and stuff. Having to sit back slowly chipping away at every enemy's health is not only very time consuming for a [i]mission with a time limit[/i], it's also very boring and frustrating. I'm keeping my monument Outbreak. It ain't worth my time
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They did that for vow of the disciple - the complaint then became that apparently difficult mechanics are “artificial difficulty”, which people also use to describe just about everything they consider too hard for them.