This is only opinion, but I dont think it has anything to do with the EZ.
If the 3rd one prematurely fails, I'd consider dropping the tank & checking for a plugged intake screen, or some reason the pumps are working harder than usual.
My original pump was recalled at 10k miles, it was working normal at that point, but replaced at the dealer. The second pump was ok at 80k but knowing it was getting worn I decided to upgrade to a fass system before it failed.
It may have to do with the average level of fuel in your tank, as some people run close to empty before refueling, which means the pump is working pretty hard to pull the fuel out of the tank from the bottom. I run an inbed tank, and usually keep the main tank over 2/3 full. That may have been helpful to the pumps.
Either way, you have to do something about the OEM system before it fails at a time of "Murphy's" choosing.
I am very happy with the fass unit, but if i was to do it again, i would consider mounting 2 redundant pumps back at the tank, and if one fails in the field, you just move the lines to the backup, and you're back in business. Then you replace the failed pump at home.
By the way, mine has had a VA (same affect as an EZ) and oversized injectors since about 5k miles.
Good luck on your 3rd pump. Maybe the 2nd was bad from the start.