No. There's plenty of room for detail for sure. Also shouldn't have any problem creating a spec mask for the lip and head material transition. It just needs a soften morph. Very easy. There's nothing wrong with the set up, just not used to it. If I had my druthers and it were my figure I would have left the lips as part of the head uv and not even had a seperate lip material. Problem with leaving the lips as part of the head is it's a right PITA to unwrap. It's excruciating... so I can totally understand why this method was chosen.