Not sure if you started a new thread, or what. I answered in the other one. But, in case you missed it and want my opinion.
I did not like my chest being touched or even seen prior to surgery. There is no sensation with free nipple grafts. If you want a "normal' looking chest, but no sensation, yes, you will have that with double incision. The skin around the areola has sensation. The areola/nipple itself, does not. If you are looking for no more sensation, you won't be disappointed.
Keeping the areola/nipples affords you the opportunity to wear a shirt in public and not be noticed. Your scars will already draw the eye...add missing arealos/nipples to that, you will certainly be noticed.