Damnit Damnit Damnit! Whew feel better. I guess I'll try shallow dips on nex chest day. I am actually starting to consider surgery(what my doc suggested). I know I'll go insane with the time off though.
I'm not sure what he has done about his rotator cuff as of today, but he should look into Active Release Therapy (ART) before he even thinks about surgery.
You'll sacrifice some chest stretch by going more shallow, but your rotator cuff is more important anyway. Try just going to upper arm parallel to ground. If it still hurts, go less deep.