How should this irreparable cuff tear be treated?

 A 58 year old woman with type II diabetes presented with several year history of pain and weakness of the right shoulder. This started while she wasworking as a stocker grocery distributorship following lifting heavy bins of hominy and other produce. On one occasion she noted an audible pop. On evaluation she had passive elevation of 140 and active elevation of 80 degrees. She had grade three strength of elevation, grade four strength of external rotation and grade 5 strength of internal rotation. There was palpable crepitus on active and passive shoulder movement. 

Her images at the time of presentation are shown below.

Her symptoms did not respond to 2 months of PT.

What would be your suggested treatment?

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Here are some videos that are of shoulder interest
Shoulder arthritis - what you need to know (see this link).
How to x-ray the shoulder (see this link).
The ream and run procedure (see this link).
The total shoulder arthroplasty (see this link).
The cuff tear arthropathy arthroplasty (see this link).
The reverse total shoulder arthroplasty (see this link).
The smooth and move procedure for irreparable rotator cuff tears (see this link)
Shoulder rehabilitation exercises (see this link).