Just to add:
These are only observations I am making based on photographs. I can't hear your room. We are also missing a lot of your measurement files. Waterfalls are only one small part of it. Remember that everything should have a reason for being there. If it doesn't help, it hurts. Can you upload the actual REW file for your before and after measurements? I can then open them in REW and see more information (as well as other members here).