This is a continuation of the previous topic/same dog but I've started a new thread as her Teres feels fine but she is still lame

I've been conservatively rehabbing this shoulder since March. Strengthening exercises most every day (a mix, got some more ideas from Anna Saunders website) and quite advanced exercises. Lots of shockwave. Exercise modification. She's not getting better

Today a dog came from nowhere and she chased it for 50m before I got her back and went 4/5 lame almost immediately

Questions: we now (just) have a surgeon who is doing arthroscopies and placing a synthetic medial ligament , I had 1 patient so far who has had this done and gone well. It's about 7k and she's not insured (cancelled it this year :/) the surgeon could not tell me if the dog could go back to agility.
Have you seen this Tx and what do you think?
2) I haven't put any sort of hobble/bandage/dogleg on her- do you think this is worth a try?
She's 6, and ideally I would like to go back to agility but the main aim is long term soundness.
TIA!!