Your opinion is welcomed but I beg to differ that back buttons are more suited for female hands vs male. I'm 1.8m tall male with lanky yet broad hands and in my opinion, I feel it was a good move by LG to have had shifted the buttons at the back and here is why..
When taking selfies/wefies the volume down key at the back acts as a shutter button for me and my index finger is naturally placed on it vs trying to press screen shutter button or side keys on other phones. Most often than not, if I attempt taking shots with side keys and screen buttons (like on my exsisting S5+) I will either fumble about and loose grip on the phone or will end up taking photographs with the full length of my arm made visible in the shots. With the back button, I have managed to take shots that seem as if they were taken by someone else and not as selfies/wefies or at least that obvious... In fact, don't really need a selfie stick either..
Not to mention, with my previous phones and my current S5+ I would inadvertently end up pressing the side keys while handling it in and out of the pocket. With the G2 and G4 not once.
Anyhow, I have a feeling that the fingerprint sensor will double as a power on/off key and only volume rockers may be moved to the side.