No, matter of fact it's more realistic than "sims" that don't let you look backward at all.
EDIT: Look over your shoulder. Right now. Your head may not turn all the way around, but your EYES are looking backwards. You can see directly behind yourself, and on top of that have peripheral vision.
No "gameplay concession" there. The only concession would be allowing you to go from rear right, rear, to rear left without an artificial delay of whipping all the way around the other side like IL2 does.
And EVERY body everywhere hates how IL2 has the views set up. It's universal.