AST buffs in 3.4 Changes to Barries and Cards.

[ZAZX]

CO is probably going to change to be a more noticeable effect. Right now it relies a lot on invisible power. You're hardly going to notice the damage gained from 5 extra seconds of a Balance card or 1-2 extra ticks of your 40 potency regen.

If you're using CO purely to extend cards, you're a fool. It's very useful when you factor in extending Synastry, Lumin. Aether, and Lightspeed.

Five extra seconds of Lightspeed is INSANE. Ignoring the burst healing potential, when combining it with Swiftcast you can raise FOUR people in less than twenty seconds for a total of 75% less mana spent while your off healer covers you. I've done it before and it feels glorious.
Five extra seconds on L. Aether can get you an extra tick of mana refresh, maybe two if you time it correctly.
Synastry is just a longer Divine Seal with its bonus benefits.

On top of that, CO's CD timer lines up well with all three of those buffs. It's an intentional design that so many people miss and it saddens me.

I've mained AST since 3.0 and CO is by far my favorite skill. For the casual Astrologian it may seem lacking, but for the raiding one it's an essential part of our toolkit.