One thing I'm missing from WoW is the combat log, which shows a history of what abilities I've used, and the damage done by them. It also has an option to show damage done to my character.
It was useful when testing / learning the effect of various abilities on one another. Yes, we have the scrolling combat text, but that's only one entry per hit, and it disappears in le3ss than a second, and is often obscured by combat visual effects.

Is there a built-in log like this that I'm missing?
I checked into ACT, but it looks awfully complicated, requiring multiple modules from various places, and seems to be a lot of work just to get a short history of my actions (assuming it can even do that.)