I can't watch the video currently. Is it basically supporting the virtues of imbalanced mechanics leading to an overall sense of balance within the game, owing to more of a rock paper scissors approach, versus overly homogenized class structure as a component of game design?

Because the former's fun, the latter is what everyone seems to want.

Zaan I think fits this well. Very high damage possibility, but many possible counters.

Now how do you see it? Occasionally on a heal bot who's only method of killing is this, but it is countered too quick.