Run tactics: Stop the tears!
I'll keep this post brief and to the point:
It's ok to run (flee) from an enemy if need some time to regen health/mana.
I'm tired of players complaining about this. If you think runners are a problem, it's likely you're simply being outplayed. Wherein the confines of etiquette or exploitation is there a basis for this gripe? It's called survival.
Same thing goes for using the environment for cover. I dunno about most people but the existence of barriers/cover offers a refreshing combat dynamic as opposed to a bland wide open battle grid.
What's next? No hiding around corners?