Correct me if I am wrong, but don't all modern heavy types that are currently available that might replace the mighty King (92, 225, 101) have high disk loadings? So downwash issues are going to have to become a fact of life and some lateral thinking might be required to develope new SOPs. What works for the Sea King might not work in the newer types.
What concerns me is that the newer types seem to be designed as a passenger transport machine and optimised for that role. As far as I can see, the Sea King was designed to hover over the sea and was optimised for that. Is the poling on these new types next to a cliff/downwind of a mountain/over a dead ship in the Atlantic going to be easier than on the SK? Certainly the extra power (on paper at least) will be useful. Only time will tell.