Alas, I have to disagree with you here.
Was it the armor that blocked the bullets or is Diana's skin now bullet proof? Considering how many bulletholes there were in Superman, I'm going to have to assume that at least one bullet struck Diana's skin.
Don't get me wrong - I love bullets and bracelets, but the idea of a God of War who can be taken out by a 10 year old who surprises her with a pistol is just silly in this day and age.
Heck, Aquaman is now bulletproof!
The scale of combat has escalated over the decades and Diana needs to escalate with it if she's going to remain the top of the super powered heap.
Lasers and bracelets. Disintegration rays and bracelets. Omega beams and bracelets. Reserve them for higher end weaponry/attacks and do away with the goofy 'I can take a nuke to the face and a blow from Superman, but a knife or bullet can kill me' idea. It was great back when bullets were lethal to the average superhero, but when Batman can take autofire from point blank range to the chest and not slow down, Diana needs to keep up.
However, I do agree with you regarding Harley, and Deadshot should have been out like a light. She goes toe-to-toe with Zod and beats Faora, but we're supposed to pretend that the non-powered members of the Suicide Squad are an issue?