Not in your position but I’m glad to hear you’ve had such amazing response to treatment so far!!!! What a win :)
From a surgical perspective I had a level 2 clearance. My only advice is understanding your arm movements might be restricted post op.. I’m 3.5 months post surgery and despite a lot of stretching/physio still have issues.. they are minor and are probably going to be worse than yours would be as I also had a mastectomy plus higher clearance.
I suppose how active do you want to be with that arm? Are you still working? Does this involve your arms a lot? Its a small risk but feeling comfortable with knowing the outcome will help accepting them if you end up getting pain/issues after surgery.
The biggest impact my arm has is I can’t reach my top cupboards anymore with that hand, just doesn’t stretch that little bit further to get there :)
Best of luck with your decision x