On our April cruise in Europe, the pool deck smoking area was only ever half full at most and half of those people were vaping, so no smoke emissions. And the casino area was never smoky.
It was our first trip to Europe since 2020, we stayed post cruise too, and it was noticeable that far fewer people were smoking.
Obviously, until your on board you're not going to know the smoking habits of your fellow passengers. A lottery along with if they are a well mannered bunch or there are unruly children.