Your issue is not an infrequent one in cases where significant dorsal augmentation is achieved.Your suggestion of fat grafting is right on; it works very well to help transition the upper aspect of the dorsal implant with adjacent areas.Hope this helps
You don't need brow lift at all, your eyebrows are correctly located at the orbital rim edge, moreover if you do a brow lift you'll have a "surprise" expression, I'd disregard this option.You are good case for upper lid blepharoplasty, to remove spare skin, and transconjunctival lower lid fat...
Brow bone shaving thru the upper eyelid? Having done hundreds of these brow bone shaving procedures over the past 35 years, I can tell you it depends on the amount and location of the bone and your expectations. Choose an experienced facial plastic surgeon or plastic surgeon familiar with this...