Are many patients still complaining about periorbital fat loss? (Photo)

No, this is not typical with Latisse, however, it can happen as a normal part of aging. Fillers, lasers, and microneedling/PRP can improve under the eyes. My patients try to get non surgical treatments to avoid surgery. We use PRP and stem cells there often. I suggest consulting with an expert to develop a treatment plan best suited for your short and long term goals. Best, Dr. Emer

Your photos are cropped so unable to see. Latisse can cause periorbital fat loss but it is not common. Aging and weight loss can also cause periorbital fat loss. If you do have fat loss, then stop the Latisse. Filler injection may be a treatment.

Some patients perceive that they have periorbital fat loss, but it is difficult to pin the problem directly on the Latisse.  Everyone has some normal fat loss as time goes on, so some of your periorbital changes may be hereditary and a factor of time.  If you feel the Latisse is worth it, continue using it as it does a wonderful job of keeping the lashes long and dark, but you could also stop it and see if you are happy with the way your eyes stay.  If you do look into fillers under the eyes, be sure to go to a very experienced board-certified dermatologist or plastic surgeon or oculoplastic surgeon who has your safety at the forefront of treatment.  Best of luck!

The short answer is yes. It seems to affect some more than others. The changes are very slow but are additive over time.I can't see that you have it by the pictures but there may not be enough time elapsed. 
I just treated a young woman who does filler injections for a living. She wanted her own lids done as she really had a deep sulcus of the upper lid. She showed me her pictures over the last decade and the slow fat loss and ptosis are easy to see over time. However, her lashes are beautiful.