Yes the overpainted picture show that simplified lightmaps
can make the level clearer.
Perhaps give a very short range to spots lights, and keep only one directionnal light for all the room ?
And by simply change the main directionnal light direction , you can avoid having too many light map shadows on screen :


In Uncharted , the main floor and walls where the player will go are not covered by lot of shadows to keep things clear !

A point i found is the colors of lights :
The green seems to come from the gems on the wall : make them
light with a small radius, they should not lighten the room
only the wall.
And for the red color, why red ? i htink it's more appropriate for some fire camp or in a submarine, or a total magic level !
Here it begins to be 2 special colors : red and green ,
for design don't mix too much unrealistic colors ,unless it's a really magic level !

Juts my personnal taste only, each people have it's own taste always,each of us will see the perfect game in a different way ! so don't take account a lot from my suggestions or other people suggestions



Well , even like that , it's good and the actual lightmaps make it looks professionnal.
Keep up the good work !