No I agree, and I view that as be design. I never viewed Oblation as meant to be competitive with with the other lv 82s. Its meant to augment TBN to be so. I also view the ability to use both charges back to back or on two targets as a benefit of it.
I do think the weakness of DRK's defense kit right now is stemming from the MP nerf almost exclusively right now. TBN barely feels available to me. Its fine enough in AOE but when trying to min-max raids I'm not enjoying it.