I believe EW covers 1939 to late 1941/early 1942.
I think all the hardness/etc should be toned down for EW. You basically are expecting planes like the b25, to pull off the roll b17s/24s pull off in LW, with LW settings.
I think its one of the main reasons the place doesnt get much use, you have planes who were obsolete by 1944,fighting against the same settings 1944-style planes compete with.
Edit: Wiki has the gun being deisgned in 1941, and production starting in 1942, But it also says the first types of 17lbers didnt see service until February 1943. If thats true, then no, they dont belong in EW,