Didn't have time to watch, I'm finally back from vacation and settled fully. I'll see what I can give you advice wise that Metroid hasn't.
I use to have a lot of problems with this match-up personally (and I'm kind of waiting for a re-match with Village Mascot to see whether I'm fully over that or not), but I got some advice from a Diddy play about his Boomerang that's really helpful to know.
1) His Boomerang is most effective when it hits you up close, otherwise it doesn't lead into a max punish and can even be CC'd sometimes.
2) The most optimal time to approach is when the Boomerang is returning to Link. That is when the projectile is weakest, and you're fast enough to land a hit and avoid it while continuing a combo.
From watching Metroid's older matches, I'd say Link is an important match-up to understand your opponent's 'pressured' habits in particular. I've managed to make my local Link player quit playing Link against me because always was able to predict what his up close options were. He had huge habits of between Shield Grab, Jab Grabs, and other things like that. I personally find it really easy to scary him (and maybe Link players in general) with disruptive Jabs and well-timed Spot Dodges against reactions. Link can't do anything besides CC -> ?? (I have no idea what would be appropriate here) against a single jab at close range.
Though, don't get too gutsy, Link's up close options are badish, but if he connects, it can be really punishing.
So, general rule of thumb: Be really close to Link or really far from him, stick outside of the Midrange.
Hopefully I'll finally have matches of myself after Facebook Official! I really want to grow out from my current Lab-Monster phase.