It is lovely ! I am in the process of making a test garment (no muslin at last). I think the shoulders are ok for à loose fit, I have small shoulder blade and slant shoudlers (there is no ajustement for dropped shoulders)
For me the sleeves are way too short, I want them like you, mi-lower arm. I added 5 cm to the pattern but that is not enough,, if I fold the cuff they hit at the elbow.