Even if the Attractiveness of these Characters is not everyone's thing but for me personally they are nice results in terms of their overall visual believeability in combination with the Hair results especially.
You guys mix a lot of things right also light wise but you shouldn't really release anything with these visual flaws saying we missed them makes you look like total beginners even for indies not knowing these problems you gonna encounter always suggest you have no idea what you doing and just put some things together and hope they gonna work in Unreal together as you expect or see from others results before releasing it into the Wild.
Programmatic flaws yeah you can oversee them but such Visual problems in such a relative yet low complex render space, who would miss that, seeing so obvious seams on the character results ?
Whenever i see something like this released "n00bs" you should have seen that the whole skin light result isn't consistent at all.
To avoid this better take your time and release at least in a visual stable state to look a bit more serious in your development effort and avoid such beginner errors entirely before releasing it into the Wild.
There is a saying "The first look is the most important and it's hard to get away from the first impression you made"
Releasing something as a "Team" so Visual flawed with Unreal on Steam as your first Impression that's gonna hunt you and you should really fix this first fast.