Lord Vader has been GL-worthy since the start. He's not a failure or a joke. He doesn't "need" a lifter unit to justify players going for him.
The problem isn't LV. The problem is OP non-GL squads with their OP datacrons. I'd be happy to see a LV lifter, but compare him to Rey or SLKR or JML or JMK and ... he's fine. He's clearly in the GL ballpark.
What's annoying is that CG decided that they didn't want GLs to be the top of the class. They're using Omicrons and Datacrons to make other squads into GL-beaters. They want a constantly rotating meta that encourages spending on ALL your squads just in case the next one is the New Hotness.
And from a business standpoint, it's hard to disagree with them. They want people to spend on the latest thing, and so they make the latest thing OP. And GLs still smash PvE content, so we're supposedly getting our money's worth from them. And that's ... not wrong, I guess?
But rather than a new lifter unit, I'd prefer that more GLs get to benefit from Omicrons and DCs. We invest a ton in them. It's demoralizing to see them trivialized in GAC and TW even if they still retain their value in other modes. But cg carefully targets the Omicrons to boost non-GL squads (or, in the case of JKCK, to boost GL squads in PvE modes).
Personally I think a lot of DCs are just OP lately, and would much prefer that they get toned down. But this particular thread is asserting that LV is bad, and I don't see that in comparison with other GLs.
If you want to argue all GLs are underpowered, that's a point of view to which I'm more sympathetic.