Most dural armor types (plane structural parts) (greater than 3.3mm) now have only 50% armor quality.
Most wood armor types (plane structural parts) (greater than 3.0mm) now have only 50% armor quality.
Fuel tanks and ammo racks should no longer create extra spalling
Most 7.7mm guns got a damage buff beyond 400m (reduced drop off) and incendiary rounds are more likely to cause fires
Most 12.7mm guns got a damage buff (reduced dropoff) keeps 85% damage at 1500m, before it fell to 85% at about 100m. Increased fire chance with incendiary filler (except m20 ap-t-i got slightly reduced). Some italian rounds got an over all damage buff.
Most cannons (>15mm) some rounds got one or both of a fire chance or damage boost.
APC and APCBC rounds will be getting the new ap_medium_caliber post pen effects, at lteast on british tanks. (40mm 2pdr, 57mm 6pdr, 76mm 17pdr, 77mm qqf mk ii, 84mm 20 pdr, 94mm 32pdr)
Full numbers will be posted when the update goes live, but no reason to put so much work into something that may not even happen, or have to be completely reworked.