I've always admired the simplicity of a big flat flush deck on a large sailboat. Easy to get around on for sure... and what an engine
room! I suspect it could be very wet at sea at times though. I would build at least a coaming around the front and part of the sides. The nice thing about many trawlers though is not living in the "cave" as many sailboats feel like.....the ability to be in out of the weather
and have nice vision and livining space with a view is a nice thing about trawlers.
I'm not sure what your second question means... you mean aded weight up high vs CG/ righting ability?