Sounds like you have a plan
The heels seem a bit high, yes, and the healthy frog just has to grow. Keep going with the goo. It works.
Get her a ration balancer rather yesterday. As long as she gets that grain-y stuff, she's at risk. I'd be a little careful with pasture too. Even if grass is short( that's the most dangerous one).
Once possible work her. The neck will improve with work.
For correcting her toeing out.....I don't think you can safely do too much without causing pain again....I have one of those.......once they're older than 6 months, the structures are " set"....