Tstand, the purpose of most so-called "tests" in most so-called "gun mags"is to sell some sort of product.
The product may be useful or it may be useless--but someone makes it and wants you buy it. And they have convinced a reviewer to write something about it.
When Tom suggested you should be more concerned with your poor eyesight if you can't hit something at 8 yards with a 12Ga., he wasn't being condescending. He was (IMHO) giving you the benefit of his decades of experience--without trying to take any of your money for a product you don't need.
I have had the pleasure (joy, really) of reading Tom's posts when he IS being condescending. He is very good at it and it can be quite entertaining. But, I can assure you this was not one of those times.
You are still fairly new to this particular group of gun nuts, but when you ask a question here, you will get honest answers from many points of view. What they have in common is that none attempt to sell you anything.
But, if you get your panties in a bunch every you think you might have been insulted here, you are going to spend an awful lot of time dislodging panties. And that, my friend, takes a lot of the joy out of sharing your thoughts.
And, FWIW, I have a similar set-up to yours with my 870--no pistol grip, but no rear site, either. I did add a tactical fore-end with a rail mounted white light and I added a mag extension, too--just in case I missed that first close-up shot, I wanted another half-dozen to convince the bad guy he was in the wrong house. Inexpensive additions that I think would serve you better than a rear site.
Crusader Rabbit