Tell that to the Devs, they still have yet to make a decent sin tank set after all this time. Sins just keep getting weaker and weaker every patch. They completely removed DR from Force Speed when a simple and reasonable nerf would have sufficed. They've nerfed all the decent tacticals and sets from 6.0 PTS into irrelevancy despite all the feedback that was given. Now they want take a huge chunk of our damage away by nerfing Death Knell to oblivion. And they completely removed Assassinate's ability to autocrit as an added middle finger, because why not?
The new Ballast Point set is only marginally better than the god awful Efficient Termination set, but it is nowhere near good enough to justify gating it behind Dxun NiM since that makes it essentially unobtainable for the majority of the playerbase. At this point sin tank gear needs a massive overhaul and it's on the Devs to deliver instead of expecting the community to spoon-feed them ideas.