At least in my POV, volcarona has moreover stuck out as a top threat in the metagame rather than banworthy in my opinion. While it is true that once it gets going nothing can stop it other than crawdaunt's aqua jet, the same could be said for lots of set up sweepers like unburden hawlucha. While volc is fast, it still gets outsped by many pokemon in the metagame like scarf togekiss, terrakion, keldeo, gengar, hawlucha, dragapult, and zeraora. Volc also needs boosts to ko stuff like mandibuzz, chansey, blissey, and rotom-heat, who can all either put on a timer with toxic or in rotom's case pivot out with volt switch chip to something faster than can revenge it. While the safeguard roost sets deal with the blobs, it has to forego coverage, meaning it can be stopped by other mons as well. Rain also does very well against volcarona, with strong sweepers like barraskweda, toad, and kingdra all being able to deal with it. Volc is a strong mon, don't get me wrong. In every metagame there are specific threats you have to watch out for just because of their strength and splashability. For example, i may have to make sure my team isnt weak to common stuff like rillaboom or urshfiu when i'm building, as they are very common pokemon and having a team weak to them would be a poor decision. They aren't constraining team building or anything like that, they are just pokemon i have to keep in mind while building to make sure i have the best possible team, being able to hold off string attacks and break tough defenses. Volc falls into this category: its very powerful in our metagame, but its not a problem and common counter play does exist for it.
For the zamazenta-C topic from the post above, we definitely should wait until dlc before we retest anything that isn't cinderace, as we still have pressing issues like toxapex at hand. While these checks do work and dlc will give us more pokemon like blacephalon, lando-t, and tank chomp to combat this doggo, 130 base attack and 145 defenses looks pretty hard to deal with if you ask me. You're sticking urshifu's attack on a pokemon with toxapex's bulk with something faster than talonflame. yeah no id like my metagame stable. All in all, we still have many more pokemon to deal with in this current stage and even afterward we have to deal with potential problems from the dlc we're getting as well as retesting pokemon like maybe melmetal, magearna, cinderace (if it stays banned), or toxapex (if it gets banned) who wont be too much with the new drops we get. I wouldn't mind doing experimentation with something like a zamazenta-c test if the metagame gets stale, it cant hold an item (which i just realized), meaning can be a bit more manageable than i thought. It may still be too much, but once we get all the bans and retests out of the way and nothing major is happening in the metagame, i say why not