Wait how are basic bland stat tweaks good? These items (Revolver, Shotgun, Fists) may as well not exist because the changes are so negligible
Why I like minor, basic tweaks is that they subtly offer new changes to the classes' core gameplay styles while adding new models that add variety and personality to the game while still maintaining its original art style.
In general, I also tend to prefer straight forward changes that let you know almost instinctively how they will change gameplay. I never use really complicated weapons like Conniver's Kunai or Fists of Steel because I can never figure out how to work their weird mechanics to my advantage. I get "more ammo, less damage" without having to watch a YouTube tutorial.
And, like others have said, I'm frankly sick of new weapons that have illogical stat alterations. If you reskinned the game like a fantasy RPG, magic potions like Mad Milk and Dalokohs Bar would be right at home.
Not that I'm against RPG elements in principle, because that's part of what makes TF2 unique (going with the fantasy thing, the classes might as well be "races"), but why does Southern Hospitality make you take more fire damage? I get the bleed effect, but simply carrying a different wrench doesn't make the Engineer's clothing more flammable. Same goes for the Pain Train, Bushwacka, most item sets, and anything that inexplicably alters the carrier's HP (aside from shields and armor, how does that work?).
EDIT: As long as I already brought it up, the worst example of this is the Backscratcher. Not only does it make no sense that simply
holding a rake lets you pick up more health from first aid kits and diminishes your ability to receive Medic health, but, when you're not holding it, it's impossible for Medics on your team to tell that you have it and it totally breaks our rhythm of healing. Seriously, if you use Backscratcher, I will not heal you.