I don't think the changes to Grave Lord's Sacrifice are helping nearly enough to counter the problems introduced. How often does Flame skull get casted in a trial? It can't be often enough to replace bb corpse output. You would have to run venom skull to get a similar output, which means no flame damage. Also, you can't pre summon a third cast of flame skull before your team pulls like you could with bb and guarantee a corpse to consume.
I'm not against making the class playable without having to rely on blastbones, but can we do it without changing blastbones? I don't see why not, there are plenty of unused skills in the necro toolkit. Genuinely ZOS should just postpone the changes and comeback next patch with a different approach.