I don't know why you think that hopping from forum to forum is going to get you a different response
the mare's injury doesn't surprise me at all considering her conformation, and I hope by a stroke of luck the foal is more conformationally sound than its dam. Had you not already bred this horse, people would suggest you buy a foal already on the ground that can better suit your needs. There are plenty out there. As it stands, I hope you are prepared to provide for this foal even if it doesn't prove capable of meeting your expectations.
Since this is supposed to be a critique about the mare, I'll add my piece. Very long back (may have problems carrying a foal so you should monitor this with your vet), calf knees, sickle hocks, a steep shoulder and a long ewe neck. She also looks a tad wasp waisted in that photo. I know she's been laid up for six months, but I can't see conditioning doing anything to change bone structure. Her build and overall muscling suggests she works a lot on the forehand, which puts a large amount of strain on already weak front legs, however the long back will make it more difficult for this horse to work off her hind end (a slight downhill build - though it may just be the photo - exasperates this). Long term soundness is a huge concern for this horse.