Title. The 1 second it takes to enter and exit this ultimate is the single biggest problem holding it back from effective use in small scale PVP (yes, it does have other issues). Given that ultimate generation is still turned off while this ability is active and not light attacking to conserve ultimate for a burst window is a huge DPS loss, activating the ultimate before it is needed is not a good option. Even with properly timed CC, using this ultimate in a small burst window is next to impossible against a skilled player due to the huge delay (1-1.5 seconds) between activating the skill and when the first light/heavy attack goes off. This is less of an issue in group play but solo the GCD prevents any skillful use of burst damage, and imo it has no reason to be there.