Im no WWII fan OR a sim fan, but I think I fit into the "have meaningful, relevant information" category.
Im more a EITHER an FPS or Strategy player, depending on mood, but I am exposed to a couple of WWII realism nuts,
and I have picked their brains on advice on how to target a larger client-base, even though none of my projects
are even remotely WWII.

With this in mind, my 'opinion' is (as other have said), go for the middle ground. But I will expand on this
a bit further. I dont know if it was Sturmovic, or maybe one of "Jane's" flight 'sims', that gave a great
deal of adjustment over the games "sim-ness" by having a simple slider bar in the config that radically
altered the planes handling from "arcade" simplicity to "pilots licence required" complexity.
The coding for this would have been a bitch, but I feel it really smoothed and lengthened the games learning curve,
so you'll want to play if for longer. BTW, this slider had NOTHING to do with the mission difficuly settings, it was entirely separate.

So if you could code in a "sim-ness" slider it would slow a players "mastering" of the game, and appeal to a wider audience.
Eg if you are at the Arcade and of the slider, you get unlimited replacement MG barrels, but if you are at the SIM and
you can only carry two with you and must wait for resupply.