I'm not sure how anyone's having trouble with Double Down, though, be that in dungeons or in raid content. You know how many spenders to use between each minute's burst (cycling between full burst, full lull, and Bloodfest lull) and the Double Down only makes it a GCD easier to deplete all possible cartridges under a full burst.

By replacing two Burst Strike casts with one Double Down, you've accelerated burst by a GCD, making up for one of two added cartridges under and full burst. And yet we're acting like it's suddenly slowed and 'clunked-up' said burst?