I believe all parameters should be given time and effort. Azimuth , I have an AZ-1 I purchased with a Graham 1.5tc arm years back. I use it with a mono lp and by ear as intended. Tried a Foz, sold it, and kept using the AZ-1 and my ears with better result .
"Straight" talk
I can't emphasize enough about the importance of proper azimuth. When even a bit off, the result is smearing of soundstage, emphasis of one channel or the other, blurring of lyrics, loss or air around the instruments...etc. If Paul Simon (et al) doesn't sing in his own space exactly between your speakers....better get a Foz.