@B.:
What about to replace Jet Fighters with Afrika Corps?
Africa Corps for sure, but I would revise or replace the Wolfpack NA, since it would be very strong in combination with your U-Boat Program! One option is to replace the Wolfpack NA with Jet Fighters! More over the Sonar NA seems a bit puny and not that historical correct, since I supose this is already considered in the destroyer abilities! Otherwise I found your NAs for A&AE are great!
What about Gibraltar Garrison or Gibraltar Fortress that we have discussed about before? I think the naval rule for Strait of Gibraltar has become a standard that everybody use by now. So I think these kind of NAs would be desirable in conjuction with the rule for Gibraltar!
Strait of Gibraltar
Ships may enter or exit the Mediterranean only if you or your allies control Gibraltar .
Gibraltar Garrison
You may place 2 destroyers for free in Strait of Gibraltar if you control Gibraltar
Gibraltar Fortress
Increases the defense of all infantry and artillery to a 3 or less