I'm so sorry you have suffered injuries that affect your skating!
I have seen lots of skaters (and coaches) use freestyle blades for both disciplines. Just like skaters have used freestyle blades for "Moves" (or "Skating Skills") and even old style school figures even though they possibly aren't optimal for that.
This is going to sound crazy - actually it is crazy, but:
Those Gold Seals that are near end of life: Is it only the relationship to the toepick that makes them so? You can trim toepicks, and make them less aggressive. Some people would say non-aggressive toepicks are great for Dance, because if you touch them slightly without meaning to, they won't stop you nor will the touch be obvious. (E.G., on MK Dance, the drag picks are rounded off, and point backwards. You couldn't make Gold Seal blade picks point backwards, but you or a really good skate tech could trim and round them.)
You could also trim the tails, so you can have the "neat feet" (e.g., place the feet closer together than long tail freestyle blades allow) many ice dancers (and the judges who grade them) prize. So not just good for the close partner positions without tripping Diana mentioned. And maybe you will find a partner. I never did, at least not one that worked out - but if you are a good enough freestyle skater to be using Gold Seals, maybe you will. Perhaps you should find a good ice dance coach (preferably of the opposite gender, so you could more comfortably dance with them) who has a lot of other ice dance students, and good relations with other ice dance coaches, to give yourself a better chance. As with ballroom dancing (which has points of similarity), there are a lot of very different ice dance styles, in the ways you interact with your partner, so picking the common style for your geographic area (as I did not) matters a lot.
But if there isn't enough hardened and chrome reliefed steel left, or the tech has had to distort the point where the rocker curvature changes too much, modifying the Gold Seal for Dance may be hopeless. And you may have been paying your skate tech extra because the Gold Seals are harder to sharpen than parallel side blades.
FWIIW, most of the very high level dancers have settled on MK Dance. I had them too, and loved them, even though I was an extremely low level dancer. Because of the short tails, the rounded toepick. Plus the thinline grind, which I believe made them fast and glide longer, and easier to change edges. But, like the Gold Seals, they are made of a high carbon steel that isn't stainless, so you have to take good care of them to avoid rust. They do have the 7' rocker rocker you dislike.
As I'm sure you know, Dance emphasizes difficult turns, deep edges, constant radius arcs, that match prescribed patterns quite precisely, and edge changes, rather than jumps. Dancers only do little jumps, and the initial pattern dances don't include any. It's conceivable you might find the improved maneuverability a 7' rocker gives you acceptable or even desirable in that context. Or not.
I think MK Dance would be terrible if you recover enough to do freestyle again. And they aren't cheap.
