Which procedure options would help improve the appearance of my mid face? (photos)

Unfortunately your photos do not show entire periorbital area (midface, eyes and lower forehead) which is needed for proper evaluation of your problem. Based on your photos, deep tear trough creases should be addressed with transconjuctival blepharoplasty, while cheeks, infra orbital and possibly, supraorbital areas could be treated with fat grafting. In person consultation with a board certified plastic surgeon familiar with periorbital rejuvenation is recommended. Good luck.

This depends on what you are bothered by. Globally, I think you can just handle more volume in the midface and also consider some possible skin tightening treatments (like microneedling with radiofrequency). Most likely you did not get enough filler the first time around. It looks like you primarily need volume now in the medial midface area to minimize your tear trough. If you had unlimited budget and just let someone go do whatever they desired, I would think something like 2-4 syringes of filler (and it's possible you also just didn't get enough the first time around).