Hello, Not sure there are other creative ideas like the Watts toilet fill valve, but we do have the basic tools like expansion tanks, for thermal expansion, or even well tanks to equalize pressure. We can use pressure compensating aerators to get equal flow under a range of pressures from 20 to 80 psi. One can get adjustable relief valves that open wherever you set it to. Install that downstream of a pressure reducer and when the reducer fails, you’ll see it at the relief valve.
Do you have a specific problem you’e dealing with?