All these entries make sense, aside from the Carbon, since I don't see many of them being used, or used well. I think it could be amazing, but due to the way rollers work in this game, it requires more work than it did in Splatoon 1. Otherwise I see these weapons all the time, especially in ranked where you will see legions of Tri sloshers, Octobrushes, and Tentateks, with a rising number of Rapid Blasters now that people know it's really good.
For the Tri slosher, you mentioned it should not be nerfed in its power, which I agree with, but it needs a range nerf and some adjustment to its hitboxes. Balance wise, a normal slosher should be able to zone a tri slosher, but in my experience, Tri sloshers can just get up in a normal one's face for an easy splat.