Mercule
Adventurer
Cite, please. Not calling you a liar. I'm just stunned. I had a player ask me about that and I said something to the effect of "Having advantage and disadvantage simultaneously is too stupid of a concept for me to even ponder. Absolutely not."They clarified that if you have advantage at all, then you are still considered to have advantage for anything that requires that (you just don't roll any extra dice). So a blind rogue who is invisible can still do sneak attack damage.
While I still stand by that statement, in principle, it's a playtest and I'll give the official rules a fair shake. I just want to actually read it before I change my ruling.
<mumble>Blind rogues sneak attacking. Ridiculous.</mumble>