Dan,
Hi and Welcome to Chef Talk.
I'd be tempted not to use it in borscht. Unless you want to add heaps of
beef boullion cubes, but even so it wont taste the same. I would be tempted to do a pork and bean soup (your choice of bean, maybe red kidney, bortolloti, chick peas).
A waste of meat otherwise - not being mean but it just won't suit a borscht. Maybe a sauerkraut dish with the pork slow cooked then added inside. Hope this helps somewhat.