think this would be a good idea. It's something I would suggest myself although with some subtle difference.
Having a trending question which we all answer would be so much fun and the inputs would be really many. We could even win the highest number of comments on a post batch if it goes viral. Musing is really doing much but I don't think the publicity level is on the high side. I feel there's much more that can be done to give the platform more visibility.
Musing works well with users contributing their quota. I feel if your suggestion gets approval, we will see many people rehashing on Twitter and. sharing on Facebook. Even here on steemit, we could have people resteeming to give that singular post more traction. This is an awesome idea.
Futhermore, the person whose post gets selected will have more visibility, more followers for his/her blog and it could give some 'steem' (pun intended) to the individual's steemit journey. I like the idea very much,