I love yellow stuff. I think giving the colors a slight shift to orange would work well.

maybe a little bit later, after I learn more about warpaint making, I will post a new version

the skulls and halos seem really cool, but i was kinda disappointed when this came out as a bunch of tiny stickers on the weapons. Removing alot of the other details and having the massive skull centerpiece as a central logo on most weapons would be good. I'm not super educated in this field, but just that small change would be a good start if you ask me

You've put a lot of effort into the details to make sure it looks great when you can zoom in using a program like Photoshop, but you should also now take the time and put the effort into making it look good on the side of a weapon in-game.

I like the color pallet but the pattern is something I just can't get behind. Too much detail for too small of a logo, something that'll get lost at a distance or be completely muddled by lower graphical settings. Hell, even in your preview photos, you can see how the skull and the halo rings just melt together into a glowing, over-saturated blob when a little light is put on them.
Reconsider this one. If you want my opinion, the best way to make a problem of too much detail better is to un-detail it. No, I'm not talking corporate logo-art levels of regressive detail, but rather making it as cartoonish and simplified as the Tf2 characters are. Making the skull and the halos different colors as well would help distinguish them.
I'd also not make the skull/halo the pattern, but rather a sticker or a stamp that goes onto the rest of the warpaint. For example, the symbols in the back would be better suited for the main texture.