I think it's just EXP, but it could also be treasure or something story-related. Notice that one of the quests says to explore a hideout, then later on it says to complete it four days later. Very interesting how they are doing this. The quest in Heroes of Ruin has steps to do in them, so I suggest these later quests take a while to complete.
Anyway, it's nice that the devs are doing this. Koei did the same thing a while back with Samurai Warriors: Chronicles where they give you a new mission or free weapon every thursday. Those missons were tough!
Read my original story on Fictionpress (Shinigami Twin): http://www.fictionpress.com/s/2996503/1/Shinigami-Twin
As well as my other one (Hell's Punishment): http://www.fictionpress.com/s/3085054/1/Hell-s-Punishment
Nintendo Network ID: kingofe3
