G'day Fred.
Some people love'em some people don't, I wouldn't use one myself. Removing it will increase flow to the pump and may help it pump easier. High oil pressure is controlled by the OPRV, low oil pressure is caused by a weak/broken OPRV spring or worn pump/main bush/big end shells. If low pressure is suspected the OPRV is the 1st place I look, then off with the cover and check the pump retaining nuts are tight.
Without any means of measuring the oil pressure, how do you know it's low?
Cheers