Randomly picked 3 to talk about because I do not have the energy to share thoughts on every weapon, even if I'd like to.
Panic Attack
Promising to see Valve has a good understanding of why this weapon is so garbage. I like the direction they're pushing it in, but it's hard to tell by the numbers just how good/bad this will actually be. The majority of the time when you're whipping out a shotgun, you're aiming to kill the other player in 1-2 shots, so that part seems like it won't matter a ton at high level play. Still though if the upside doesn't end up being too much, I could see this being around stock shotgun level in terms of how good it is. Even if it turns out to be a little better, I don't think the game suffers from seeing more shotgun pockets play. As long as it still leaves gunboats as an option for pocket players, more hit scan on the field to counter scouts is a win in my book.
Rescue Ranger
I don't think this will impact 6v6 at all really, this weapon still seems too strong to be unbanned. This weapon is too strong because the engineer can heal his gun forever while staying completely out of harms way. Maybe Valve was thinking a lack of metal would prevent an engineer for just healing it forever, but only loosing 15 metal per shot means the gun will die far before the engineer ever runs out of metal. I think Valve needs to take a step back from the healing aspect of this weapon all together. It's got such a cool mechanic in that it can teleport buildings, focus on that instead and make the healing take like, 75 or 100 metal. Even removing the healing factor all together wouldn't be a bad idea if it got some other buff.
Fists of Steel
I didn't even really hate this weapon before it got unbanned. To me it seemed like running out to soak up damage as a heavy with your melee weapon out was sort of a gimmick play that would be countered by ignoring you, but I see the problem if it's a last point or something and the heavy runs onto the point and you loose because you couldn't do enough damage to the last player left alive and respawns come in. Hopefully these changes are enough, I don't think it's really possible for Valve to strike a sweet spot where they don't have to be banned, but also aren't completely useless unless they get a complete rework, but this weapon is kinda boring, nobody's going to be upset if Valve uses it to mess around and try new stuff with.