Yeah, won't lie, some of your post looks hard to read.
Anyway, the issue is Yink still has the factor of being Link, who has 4 iconic moves. I could see some moveset differences, but not the Special Moves at this point. Not that I think he has a real chance of coming, but eh. As for the Final Smash, there's literally no reason to keep it Triforce Slash too. There's no traditional reason, or iconic reason in this case. As I said above, every Link is known for the Spin Attack, Bomb, Boomerang, and Bow. Even Soul Calibur made that clear. It's what he does. They may not appear in every game(in fact, the Spin Attack started in ALTTP, but the other 3 were absent in Zelda II, and the Bow sometime is replaced by a similar type of item in usage), when you ask what Link does, those 4 things come to mind heavily. Albeit, the Spin Attack less so, but the other 3 items are very important to who he is. I would be okay with slightly varying them with Yink by having a spirit-like being of the Zora, Goron, and Deku show up as he does the respective similar moves, with them being updated, but while that at least fits the criteria of iconic and makes him unique, it doesn't seem likely. Although to be fair, their more specific variants of the moves are extremely different. The Bubble Deku Link makes is very slow and has stunning properties. Zora Link's Fin Boomerangs come out in pairs as is, which already would make a difference alone. Finally, Goron Link's Powder Keg is significantly more powerful. You could technically switch Deku Link to the Spin Attack instead(as he does have both an aerial and ground variant) and keep the Bow, as that was a centralizing item to the MM, and key to the actual dungeons, but... well, you get the idea of the iconic weapon issue.
However, the Roy comparison falls flat. He was a clone, but he also didn't have specific iconic moves in the same way the Links do. Their 4 special moves are beyond iconic. Thus, he is easy to change around because he isn't tied to key moves that make him recognizable to anywhere near the same degree. Also, didn't his special moves more or less stay the same anyway?