I never understood why people hate WW 2 as setting with such passion, but embrace modern / near-future stuff as bestest setting ever when at the end they make next to no gameplay difference. You are still going to have your AR15, MP5, Beretta 9mm, .338 Lapua Magnum etc. even if they look different. Either old-ish timey, modern or modern with some laughable doodads added to make it "future".
Personally I'm bored as hell of modern / near-future stuff for FPS as it's all we have had since CoD 4 and no one does anything interesting with it.