So ... if you want to have advantage, you cannot have any disadvantage, and it dont matter how many sources of each you could aply, they all count as 1 ... corect?
So how can you aply Snake Attack, if its description specificly tells that you need to have Advantage ... and litteraly "cannot have Disadvantage" ?
I believe so.
First of all it seems to be a nerf to high ground which I appreciate (I still think it maybe too powerful, but it's definitely better) - so if you attack from highground, but enemy is far far away, or concealed in darkness it will just be normal roll - no advantage, and no ranged sneak attack.
I didn't have too many problems with using my sneak attack (aside from the issue mentioned above when attacking enemy engaged by another party member), but it requires slightly more preperation and stricter positioning. I found it rather impractical to try to get sneak attack out of advantage in melee combat, "flanking" is far easier to achieve, but they need to make it more reliable.