@coriwithclass inspired me with their fine fix-it drawing, so I decided to take a crack myself :D
Since the original cover needs so very much help (I'm not sure the comic artist has ever seen a human woman in person before) I decided to go easy on myself and just do a sketch fix instead of rendering anything out.
First, I focused on adjusting her bonkers pose, fixing the escaping butt, and correcting her wonky anatomy, but left the original outfit alone. (I admit I skimped on some detailing here because WTF is this poor woman wearing... Pretty sure all the straps and belts are to cover for the bad anatomy in the original)
Ok, looking a bit better. She's got a neck, her butt isn't falling off, her face isn't melting, her tiny arm is now regular sized. Her boobs aren't supported for crap, but at least they're no longer vacuum sealed into her top. (I realized belatedly that her boots aren't actually thigh-highs - what I thought was the top of the boot was just a weird garter she's wearing for no reason. I have no idea why, other than presumably the artist thought it was sexy?)
Generally, this looks plausible now. She could be a human woman in a cheesy action flick. Maybe she was mid-Cosplay-Photoshoot and got interrupted?
But I really couldn't stand the outfit, so...
I took a crack at fixing that too.
Now her hair is pulled back so she can actually see what she's aiming at. The random little X-shaped barrette that was just sort of dangling at the ends before is actually holding back loose strands from her face.
I figured she'd probably want her boobs supported and covered to keep them from painfully flopping around (or getting red-hot bullet-casings down her cleavage during a firefight >o< ow), so now she's wearing a supportive bra and a comfy T-shirt instead of... whatever crop-top/boobsock thing she had going on before was. I also extended the jacket to a more normal length for similar protection reasons.
She's wearing flat sturdy boots that let her move and run normally and actually protect her feet and legs, plus jeans for the same reasons. I scrapped the weird thigh garters because they serve no purpose and seem like they'd be extremely uncomfortable and impractical.
I know just enough about guns and the kickback from said guns to know that she's probably about to eat the back of that uzi the second it fires. Unfortunately for her, I don't know enough about guns to actually fix that problem for her, so... ...Hope she knows a good dentist, I guess.