Baring witness to the fact that no one has yet to cast the first stone and break the silence, I will be the first to tell you that Yes, the work appears to be very dotty, the density is not adequate and the replicated hair follicles are clearly larger than your native hair follicles on the back and sides.
Putting that very large stone to the side, I beg you to answer a few questions in order to properly proceed.
First, have you been able to wash your head as of the last treatment?
Second, have you been able to possibly buzz your hair down in order to give your entire scalp a uniformed length of hair?
Third, did you voice these observations while at the clinic?
I ask these questions because I truly feel that it could all boil down to there being a large amount of dry ink surrounding your MHT pigments, that upon a good wash, might make way to the replicated pigments look/appear their real size.
Also, I feel that when buzzing your hair down, it might allow for things to, at least visually, seem more the part by way of giving you a leveled landscape of hair follicles, versus a stark contrast between the top and sides.
You are certainly right in that the crown does not look finished and, if anything, WILL need a 3rd and possibly 4th session to truly culminate the work back there.
Keep us informed, keep us aware, keep us..
DHT