Not much more besides the title, just have been enjoying the Plasma Gun buffs, and the Ironhelm is super fun to use after T hammers got buffed as well. Still probably not perfect but miles better from launch.
As for the other iconic weapons, bolters and the XII Kantrael feel great (people say bolter is op, I disagree mainly from the fact that its hard to use at range because of DTs atrocious recoil model), and the 2 new force swords are awesome as well (I love the animation for the Deimos, stabbing someone and channeling power through the sword to blow off their head). Power Sword obviously is a bit of a see saw, but at the very least when it’s going it feels amazing. Grenadier Gauntlet on the Ogryn also feels good. Flamer still feels great after the nerfs, and I would argue is more fun to use because you have to be (a little) smarter with how you use it.
For weapons that still need work, I think all 3 chain weapons (sword, axe, and Eviscerator) definitely need love. I think the sword and Eviscerator probably just need more horde damage and cleave, but the chain axe probably needs a whole rework (which seeing how FS handled the T Hammer means this one will probably always be worthless until we get a usable variant). Part of the problem with the swords is they don’t have access to the best blessings (aka power + blessings) and while the Eviscerator feels great on t4 it really struggles on t5 in my experience (if you have a build that works for it please let me know, I would love to try it out! I have savage sweep and either of the cleave blessings). Another one is the Ogryn Shield, which while its special probably should get a rework, at the very least it needs a lot more damage. Both Power Mauls also need a looking at, because throwing enemies around will always be worse than killing and also have atrocious blessing pools. Accatran pattern lasguns also suffer a bit on higher difficulties and could use some damage ups, but they’re really only iconic to Elysian fans (Harakoni Warhawks are better 
).
Any other iconic weapons currently in game I forgot about? There’s obviously a lot of work to do, but actually enjoying running the T hammer and Plasma Gun at T5 feels so good now, so I hope they give some of the other underpreforming weapons some love as well.
(I didn’t include the Guardsmen shovel because I think it’s good/funny that it sucks and I hate all the super unfunny le Krieg hit people with shovel and kill everything lol!1!!!1!!1!1 jokes).