Hi @Jasper_W - maybe this should have been a new topic?
Anyway,
Your V1 layer has an open surface in it - when untrimmed (for checking), there are some issues with it:
I assume that’s why you ask if there’s a way to make the original surface less complex - however a relevant question would be why is the surface like this in the first place? Can’t we avoid it being made this way?
What do you mean by ‘it doesn’t look very good’ ? Are you referring to its creased appearance as opposed to a smooth one?
You can turn your 4-point surfaces into quad meshes, join them, and convert to a SubD object so it looks ‘smooth’:
Obviously the SubD isn’t a ‘surface’, but maybe it doesn’t matter?
Another fair question would be if you’re looking for a single, untrimmed surface - then it would matter I guess 
Best