True there haven't been many tributes to the American silent service lately except SH4. And it's a beautiful game, isn't it? Though, with all due acknowledgment and respect, almost every other game is a tribute to the US military if you come to think of it. That repetition gets a bit boring for some gaming enthusiasts like myself. Also, SH3 community and U-boat fans have the right to be entertained every once in a blue moon, too. No?
Playing a video game from the "other" side won't hurt/change you one bit either in my humble opinion. I get sad when people think SH3 players are not so politically positive, or the "us and them" bollocks. My personal set of ideas and values that I respect are not so weak that playing a video game from the enemy's side would affect them. Variety is the spice of life, remember!
As for what other games? Please allow me to point out a few examples. US soldiers with M1 Garands, Tommy guns, M16's, UZI's. Games: medal of honor, company of heroes, call of duty, brothers in arms to name a few. American spies/commandos get their games: Splinter Cell (with patriotic stuff too), etc. American pilots get <insert popular air sim names here>.
Now, my friends, you have to realize that not every gamer (especially those well beyond and past the teens era) would love to fire the same old 5.56mm (weak caliber tbvh) modern rifle or the old M1 rifle/tommy gun in -every- other shooting game. Or fly a F-15/16/18/22 in every flight sim, or always be a spy who overcomes the security of some north african rural settlement. Or drive a submarine that rarely gets depth charged enough for you to break a sweat. That's how I see this matter and I'm glad UBI sees it that way, too.
However, I'm all for a Apache helicopter sim though, and it's been ages since I've played a good one.