These sound like good changes. Hell, I even like the Opel changes. If you want to share resources you can still get caches or have one player go Luftwaffe Supply and spam those sweet, sweet air-dropped resources.
One thing to note w/r/t blitz: in the bad old days of Wehrmacht turbo tanks they could Blitz even with a damaged engine, something that isn't possible any more. I guess we will see what happens, but, man, 50% extra speed is a lot!
Mmm... Propaganda Artillery price decrease. Terror Tactics prop war + KV-8 base rush troll strike got even better
