I broke my should after a crash and had 5 surgeries to completely repair it. Had a lot of physical therapy, but have never had any issues with it when I start back riding. I always joke with my wife, that I am the 6 million dollar shoulder, they can rebuild it, make stronger, faster....
. Finding the correct PT guy was key, he was painful, but I regained 99% of my range and strength. I still have some nerve issues as as the nerves got tangled around some of the bone fragments as they grew back, but not a whole lot I can do about that. Only bothers me if you were to do a shoulder rub or something like that, else no issues.
I do not see a need for any suspension being needed for your issue.