Usopp didn’t even expect Gunko to lose half her body from that explosion
regen must be making these people paper weak
Haki is a limited resource. Logia usage is a limited resource.
As far as we know Gorosei/God's Knights regen has no resource, so there's no reason to waste energy moving/using Haki/using Fruit. Gunko can redirect attacks, but she doesn't need to dodge if she doesn't want to.
Obviously there have to be weaknesses, but, as of now, her Regen is simply what Saturn said it was "if she worried about getting shot, she would have dodged".
Gunko's pose afterwards makes me think Usopp didn't even catch her off guard; she's supposed to take Colun hostage, and blowing him up would be bad. So, she took the hit, rather than redirect it and risk it blowing up Colun.
People who think it's a durability issue are addicted to power scaling like some people are addicted to crack.
Oda is an artist; Gunko is getting blown up because he wants to be able to redraw her putting herself back together, and wants to give Usopp a cool moment in Elbaph. That's all it is, and we've got people power scaling Gecko Moria and Doffy and shit because Usopp shot a chick and it did no actual fucking damage, holy shiiiiiiiiiiiiiiiiiiiiiiiiiiit
The inability to consider what ODA LIKES AS AN AUTHOR is why this fanbase has some of the craziest takes I've ever seen.
Now when is Lucci x Stussy happening?