I see nobody has taken a stab at this one yet so I'll offer my opinion, as just that. It seems to me that as long as you comply with the variables of ASME Section IX for your circumferential groove and ASME Section IX for your overlay with the required testing for both, then you have an acceptable qualification.
I'm not sure this answers your quesiton becasue I'm not sure I'm really clear on what your asking, but at least the dialogue has begun.