Since a lot of the time I focus on things that I dislike in games, I thought it would be interesting to take a look at some small elements that I consider examples of elegant design.
First up, [Glyph of Life Tap].
In the beginning, there was Life Tap. And the warlocks looked at it and saw that it was good.
So the following scenario unfolded in dungeon after dungeon:
1. Warlock pew-pews until she runs dry.
2. Warlock Life Taps all the way back to full mana.
3. Healer has a heart attack when they see that someone just dropped to 10% health unexpectedly.
Efforts to get the warlocks to Life Tap more often met with failure. It's not that they meant to make life excessively exciting for the healers, it's just that you don't really think about mana until you run low.
But Glyph of Life Tap changes that. It encourages the warlock to Tap every 30 to 40s, keeping their damage buff up (which is what the warlock really cares about) while simultaneously keeping the warlock's mana levels up and keeping the health hit manageable for the healer.
I like Glyph of Life Tap because it nudges the warlock to play in a group-friendly manner, while still preserving the full use of Life Tap. A more heavy-handed solution might have been to impose a 20 second cooldown on Life Tap. But this would make Life Tap more rigid and less versatile. Because Life Tap affects your health, there are many situations where you need to postpone using Life Tap--or use it early--and make up for it later by Tapping multiple times.