It's difficult to know what he wants from the way the question was asked. He was writing about an f2 aperture and f11. So I don't really understand his question. If he wanted to get rid of the actual waves and have a milky water type, then a long exposure with a graduated ND filter should do, but at F2? Not so sure about that aperture to get that effect, if that was the effect desired.
Yes i would like to go with faster shutter speeds 1/60 - 1/125 at least or even faster. I'm looking something to stop the over burning of highlights.
I googled iso 6400 samples, few came up by D800 and RX1. Seems like good match for shadows (no plastic look).
But for sunrise landscape, the reflections on waves look super contrasty, maybe ND can help without milky motion blur look, and for that nice sun not to over blow.
I'm also looking ND filters to shoot wide open with Zeiss 35mm and 100mm F2.0 in low light and in bright daylight.
For landscape and for street photography. To keep the highlights perfectly defined on white dress, chrome and water.
In my area there is mostly illuminance ~ 70 000 Lux in sunny day.