Kizabum

Well, it's not meant as a huge reach but longer than other melee attacks. It could have attacks that snare/pull enemies to you as well. But true, not all would jump to try it on nor fit their preferred style. But overall, tankers, brutes, and scrappers share the same melee power sets (at least what I saw in a glance).

Ah, I see it has been suggested a lot. My main guess is that the issue is perhaps with the animation and rigging of the models in the game files. Would need full dedication to work on making a workable rig, followed by animation itself to be consistent and trigger the impact effects in the right timing.

It's overall more for fantasy of using a whip in combat with cool animations is main reason suggesting it. Just as an advanced note, I am new to the game and so may not know all the dynamics between all power sets or whether there is a niche which whip could fill, or what debuffs, if anything, it could provide. But I myself lean towards it just sake of theme/logic, that whip user would have a wide range/longer reaching melee attacks. The only whip I have experienced is from a mastermind with demon summoning, but this is more of a normal whip than a magical power-granted one. Also, it could have several quick attacks, not necessarily high dmg, but could have 'bleed' dot dmg on foes struck and maybe some 'stuns' created by shock/pain of whip strike or such? Overall, fast, low dmg (but dot dmg), reach, quite a bit of melee control is what I am thinking, but not sure is there power set like that already. But as said, more fantasy in mind, I suggest it cause I feel not experienced enough to suggest any solid mechanics besides what surface glance seen from other powers.

I agree that it should be an optional feature, default wise off, but can be turned on if desired additional indicator when your low HP. Or even adjust when it's triggered (10%, 20%, 50%).