Epic fan-fic
To say the dialog isn't cheesy at times would be a lie. But to say that it's bad overall would be one, also. While I can't say i bought into the storyline immediately, the work of art you've produced (all of the episodes, really) are fantastic. It's not the best artwork ever, but it's consistently good. I didn't really like him creating/reclaiming items out of thin air. Din's Fire being the exception.
Obviously since it's not over yet I won't make any assumptions on how dark link ties into a bigger picture, but given the first 5 episodes, it seemed merely past-grudge. Which would mean Dark Link is his own entity? Maybe i'm mistaken, but Dark Link always seemed to be a magical copy of Link, sent by a stronger entity (Ganon, for example) as a sort of goon, not really a person in his own respect. The only exception to this I barely know about is the beginning of the Four Swords Manga (again, however, my knowledge on this is limited).
Bias aside these first 5 episodes were great. Keep up the good work.