This… isn’t experimental. While the US Army Corps of Engineers might not have updated their shore protection manual to include “dynamic breakwaters [and beaches

This… isn’t experimental. While the US Army Corps of Engineers might not have updated their shore protection manual to include “dynamic breakwaters [and beaches]”, we have design formulae to say what size rocks and what thickness of fill you need for your desired steady state* profile. Bonus points because the smaller rocks are significantly cheaper than the large, immobile armor units, and they can even withstand ice floes better if your coast freezes up. * there will still be seasonal variation based on summer/winter wave patterns and weather.