I like the size and setup of the levels, but I agree that the pattern is a bit much, it loses the standout affect with so many of them. If it were me, I would have one of them at each corner and if you have odd number of panels, put one in the center (I think you know what I mean by panels). You could make the other panels in either a variation of white or black, such as a cream or charcoal, they would complement each other.
But then, I am no designer and I am sure that others here would have better suggestions.
As for the statue, I think the idea of one there is a great idea, but perhaps something smaller.
Build a small platform and place a smaller statue that will be seen but not overwhelm the roof.
I have learned from the home that we bought that you need just one focus point, not several. In what is the family room is a HUGE elaborate fireplace (4 ft wide 9.5 ft tall) in the center of one wall and across from it the patio doors. Makes it hard for furniture arrangement as it is a long and narrow room 22 x 16 with 10 feet ceilings. Build to hold the original owners antique furniture. Front room almost same size with another fireplace (they are back to back) and across from it bay windows.
Smaller is better
I like the setup of the levels and windows and the shape of the boat. Do you have photos of the inside yet, or is it a shell? I would love to see what it looks like, I'm not ready to start building my own houseboat yet. I would love to have this one for a home in IP.