I know what you mean. The VRO pump bit me a while back on my 90 hp. The diaphragm started coming apart and filled the carbs with debris. Threw the VRO in the round can and went with the still avail. fuel pump only style. KISS method. keep it simple and servicable. (I changed it up a little.)
Electric pumps are a PITA. Been there too. In fact the Optimax and the EFI Merc motors have both a vacuum operated pump and a VST with an electric pump to jump up the fuel psi for injection.
In order to make the mechanical pump work they would literally need to re-invent the wheel. Due to the efficiency of the diaphram pump and its simplicity, that will never happen.
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1996 -19' NV Flats 115 Mercury 4-stroke
1983 -20' Wellcraft Center Console 250 XS
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