How about the introduction of the RZ65 and RZ73 system though ?
It was used on Bf109F, FW190s and on Bf110 (up to 12 rockets mounted under the belly of the aircraft). Even if precision was not so good, it could give at last an antitank rocket to the Luftwaffe.
http://www.wehrmacht-history.com/luf...ir-missile.htm
http://www.tarrif.net/wwii/guides/a2g_rockets.htm
I think this could be interesting for pilots who wants to have a twin engined ground pounding aircraft like the P38 but on the blue side.