i dont know if this is been said but i will post,
i agree that purple for me is at a disadvantage, i play with locked and unlocked screens but till find purple to be at a disadvantage, for my personally because i play on a laptop the screen is much smaller and my HUD constantly gets in the way, i dont see why riot cannot change the camera angle to match blue side, it should be hard since the map is a mirror image of itself, i find playing blue side has more range advantage compared to purple, with locked screen, i dont see why people say you are noob because you play locked, so what its personal prefence also depends on the type of character, range character sure you can play unlocked, but for melee whats the point? if most of the action happens right infront of you.
so for me id like to see and option or change to the camera angle.