As stated in this video and many other damage number tests of Supers and abilities when they updated 3.0 classes, Bungie seemed to have forgotten Warlocks and what makes them unique. Warlock supers across the board have the weaker of the supers and the ability uptime without any extra benefits. Two examples first are Devour. Although Warlock has an easier time proc it, the other subclasses have a much more robust version of it that they can spam with their different abilities, especially Hunter, who can use devour and go invisible back to back as their class ability is much more adaptable than Warlocks.
A second look at arc supers, even Chaos reach, and geomag, it takes longer to deliver a lower amount of damage than what the other two classes can dish out in an instant.
See Ehroar's video, which details the issues of the Warlock class despite the 3.0 subclass changes.
https://www.youtube.com/watch?v=T2ZNz_KmrF4&t=17
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i think warlocks should go through some changes to get our identity back.