I’ve seen a theme of advantage and disadvantage dice being added to some newer PBTA games (the first time I think I saw it was in Vagabonds of Dyfed), and I really don’t know how I feel about them in play. I really love how they feel on paper, but in play they’ve often fallen a bit flat.
My main problem is that I think that it makes rolling feel a bit pointless if there are any stacked attribute bonuses. By just having an attribute bonus of +1, rolling 3d6 and taking the highest 2 results in about 50% of the rolls being 10+. In VoD it says that:
Advantage and disadvantage are granted by the GM due to external factors, enemy abilities, or when a PC or NPC helps or hinders your action, using up their action in turn.
Advantage and disadvantage cancel each other out, so if you have equal advantages and disadvantages, you roll at neither. If you have more advantages than disadvantages, you simply roll at advantage, and vice versa.
But, if the gm is just cancelling out his own advantage and disadvantage rulings to make a roll feel risky, is it even worth it? Does anyone have any examples of advantage and disadvantage working really well in PBTA, or is it just kind of bad mechanic for PBTA games?