About an hour in to the mission I discovered that Nazis are actually kinda dumb and you don't really have to be very careful at medium difficulty.
Also, i don't understand why there are non-lethal options in this game, but I suspect there may be liberalism afoot.
I should note - If I did knock a Nazi out I specifically went back and shot them in the head. Those ten guys were accidents. Would have gotten them if I could.
No bugs in co-op? Woah, that's pretty insane. I played SEV2 with my dad as a kid and we loved the co-op. It was buggy as shit but it was so much fun.
I'm definitely gonna look up gameplay of that level, because I'd love to get a better SE experience. I felt like 4 was kind of incremental upgrades from 3 so I thought 5 would be more of the same. Maybe I was wrong!