I honestly don't think you need to worry. While necro may become tankier than it is now (which that isn't very tanky in the current meta with teams that know what to do), it wont become a cancer bunker like some of the bunkers in previous meta. It doesn't have stability or heavy team support. No vigor access/spam dodge ability. You also have to keep in mind that necro is taking some nerfs too. Doom (core shroud fear) is getting a cast time. If you miss that, its a huge amount of LF loss which helps tank in shroud. Necro boon rip and damage Is also getting hit. So even if core is tankier, how impactful will the build be in a team comp? Long story short, I would wait to see how the patch plays as a whole before asking for nerfs. If it needs to be tuned a little bit, so be it. I just don't see it being a problem like you think it will be. Experience: I've played necro on and off at the highest level of pvp since closed beta.
How is it like fighting a water weaver? It has 2 dodges (not counting a vigor source from somewhere)...you can still hit it even if some of the damage is soaked. That means you can still "interact" with it. A necro will never sustain as long as the current meta ele builds.
