It will have many of the same issues too, common to all ground-effect sea planes, namely that wave height, rogue waves, weather conditions, and the ability of pilots to remain highly focused will be major limiting factors.
I just wonder about the corrosion problems of an aircraft that spends all its time next to the water.
But maybe this kind of thing is made out of materials more like a surfboard than an sr-71.
I'm guessing modern sensors and fly-by-wire systems might at least handle the last part.
Why must pilots be highly focused? To avoid hitting the ground? I hope there is some autopilot to help with that ...