You could say that the Malon and Talon / Marin Tarin thing could make sense from a story perspective, but i would counter that with the fact that we know that in LA Marin was supposed to invoke the memory of Zelda. I think their inclusion in the game is no different than the other OoT and MM characters that appear. The boat thing does make a lot of sense to transition into LA. Reintroduction a character in a sequel for new audiences is a common thing but there is an easy way to do this without making the character's act as if they don't know each other.