Without being able to say what the DoL will be like since I'm still under NDA and I just played the Alpha version, I can still answer one of the question.

- Random monsters getting caught while fishing will not happen. Gathering won't give you junks anymore (past dev letter). You want a moat carp, you either get a moat carp or nothing at all. With that in mind, this clears it for the random fished monsters. Also, the "can't change class during combat or aggro" system makes it pointless to have a random monster pop when fishing.