I have had several transplants over the last 20 years. My donor area is generally depleted and cannot support any large procedures. I have 1-2 very small (quarter size) areas that if some additional transplants were done only in these strategic areas my hair would appear much fuller. Considering the small amount of donor plugs needed could these be provided by smaller more random/scattered donor sites as opposed to the larger harvesting rows that are more concentrated in one area. Thereby minimizing the thinning effect we see in a typical donor area.
There is an art to making less hair look like more hair. I have many patients like you who have paid the price of the old antiquated procedures of the 1970s and 1980s. I have already written articles on the subject, but what I do for each patient is a one on one determination that takes the years of experience I have spent to develop the Master Plan for such person. Simply put, a good doctor, upon examination, should be able to determine the answer to your question.