The reason for PoR Ike > RD Ike, is because of how poorly the polls were managed, RD Ike is hidden away in Radiant Dawn, a game not many know about, and Ike being the protag of both, but people first intuition will always go for PoR when they want to vote for Ike, that's why PoR Ike >RD ike, they should've just listed PoR Ike and RD Ike as one character, this is actually the only instance that being the protag. of 2 games was a disadvantage xD.
As for my suggestion for Ike, I would love for alt. costume to be a feature in the new Smash, each character getting an alt costume which are unlockables, so Vanguard Ike here we go.
But the biggest change I want to Ike would be a balance change, being less floaty, losing counter for Eruption, which well act as a counter like Corrin's, Getting the Sword beam, which will be fast but weak, will act as a spacing tool, and to balance it let it be a rechargeable beam, so you wont spam it, with an indicator that show you that the beam is fully ready to be released, auto charge, once you release it, you need to wait 2 seconds to throw another beam.