I wish the Status Effects panel on your character sheet was contextual. Like, when I highlight my +39% Arcane damage on my sheet, over in the other pane it should say, "Moonlight Ward (29%), Palace Boon (10%)." If I've got some Arcane Attunement stacked up, it should list that too. For my CHC, it should detail the base 5%, plus the boosts from all relevant skills and gear.
One thing I just noticed that should address some other complaints though is that when I highlight Arcane Damage Increase, not only does the description underneath explain what ADI is, it also lists my Arcane Damage of 188k, a 39% increase over my Damage ("sheet DPS") of 135k. So that should help fire-starters know their "real" DPS, for example.