Not sure about designs explicitly for packrafting. I have a kayak touring setup already. I have a Stohlquist EZ drysuit with a neoprene neck gasket and front zip. It works well for me and I don’t get leakage when inverted, but the neoprene neck does not fit as wide a range of neck sizes as a latex one. A friend using one had problems getting the neck closed up enough for a half-decent seal.
Would be worth looking for a women’s design suit and trying some on. I don’t know of any suits that tick all the boxes you have though- there are very few with neoprene neck gaskets.
I also have a Level Six drysuit with latex gaskets- very nice suit but zip over the shoulders so I struggle with it when alone so mostly use it when paddling with others. The latex neck doesn’t really bother me too much as I have trimmed it so it is snug but mostly forget about it while paddling.