Excellent job so far Buzz.
Might I add a suggestion: I would actually have to say that Young Link doesn't do as great against Zelda as you mentioned. He may have a small advantage, if that. The only reason is because her fair and bair are a big OUCH on the small stages.
Another thing is something you might want to mention in the Link charachter matchup is to be wary of his nair-off-the edge edgegaurd. I can say with my experience that it's tough to try and maneuver away from it or hit him with your arial upB before he hits you (esp. hard since he FF like a rock
) and it's also a bit annoying when I'm going to hookshot sweetspot but before I can even latch on his boots right in my face XD. Also, if my memory serves me right, if a Link CORRECTLY performs his SHFFL'd nair right and counter jabs after the SHFFL I don't think he can be shield-grabbed. I would say this is useful to keep in mind during the fight.
But remember these are just SUGGESTIONS.
Other than that, yeah, it's coming off nicely. I esp. like what you're doing in the Link section with the different approaches and strategies to take when exploiting his techniques in the match and punishing him, doing so.