I can give sevaral..one indeed over Yugoslavia in an encounter between Yak3's and P38's (that had in error bombed a Russian column) some thing like 6 Yak 3's launched to attack what they thought were 15 P38's (tuned out to be 45 of them in three separate groups at tiered altiudes). Point being that much of the ensuing fight was conducted within range of Russian medium calibre AA (M1939) which claimed a 38 and damaged another as well as one of the Yaks.
Many Ost front air battles from The Crucible, thru Kursk to Bagration were conducted over and in semi mobile medium calibre AA. (none of them with Wirble winds which never left Germany for the whole of WWII AFAIK)
Having said all that I would agree that GV icons should also be reduced for freindlies (although this will not stop folk running to them), I would even go so far to suggest that land based gun fire be as lethal against freindlies as it is against enemy, that the Mobelwagon and the Sdkfz 251/17 and or a towed 37mm flak (M1939?) be introduced and Wirbles and Ostwinds be perked.
well with the addition of 88's now for AT/Puffy ack, and Air to Surface Icon Range reduced to 600 feet, this poses a great risk to pilots under 2k unless there is a storch around, which means ground battles will be left alone, and bases will be much much easier to defend.
I do believe we need more AAA vehicles, one which was a single barrel 20mm, the single 37mm (both were on a sdkfz halftrack) (where wirb and osti is perked), perhaps a russian AAA vehicle in addition to the M-16, it gives an all round "complete" AAA setting.