So I have noticed that sneak attack is very hit or miss on how it works. About half the time I do not have to hide first if I am out of sight, the other half, I have to hide first. Further, sometimes I cannot get off a sneak attack (even when in sneak mode), even though there is no line of sight showing where I am standing, and other times I can get off a sneak attack when I am standing in line of sight.
I know sneak attack was recently modified, so I imagine it just hasn't be ironed out yet, but I'd love to see more consistency for it.