I dunno, the purpose of gun blaze is for its cross up feature. Don't see how that can be applied very much to a smash game.I respect your opinion duder but I think he would be a solid character without the move being able to be jumped out of, in fact I think it would be a more interesting move if it took a page from guilty gears book and made it like order sol's gun blaze, which if you're unfamiliar with the move, he slides by his opponent (I think it has a couple inv frames) leaving a pillar of flame that pops them up and allows for a combo. Here is a video for reference since my explanation isn't the greatest http://www.youtube.com/watch?v=SbuofWwSJwo.
The way I see it working for ike is the move could have faster start up and have a couple frames of heavy armor to help relieve pressure against weak attacks and projectiles, inv frames would make it a bit too easy to abuse, then he could do 1 of 3 things, 1) nothing and just zip past someone, 2) do the standard frontal sword swipe he has now with b, 3) with hitting a he could zip past someone and do a gunblaze esq move, resembling that small hitbox behind him in his fully charged quick draw. This would help with his inability to deal with pressure to a point, and it would also give him a more interesting way to set up combos as opposed to him being able to do wacky stuff like zip to you with a jc grab.
I think wall jumping with it is fine, but it should only be once lol. Its not really completely broken in its current state, but its pushing it, and sorry for the wall of text about ike, I don't wanna cause drama.
The thing about ike is, he is pretty vulnerable if he whiffs aerials. He doesn't have very good air velocity to make up for it. He can however use QD as a way to re-position himself quickly and apply a layer of mixup so he isn't as one-dimensional about his approach.