Hey xjouve, for the missions part of this MOD, may I suggest that you try to incorporate OH's mission MOD.

As you know strategies changed throughout the war, For example:

(1) Solo flights were more prevalent on both sides earlier in war, and you'll need JJJ's ME to modify the generated mission (xml) files.
(2) Fuel shortages for German side also needs the ME to edit the mission file.
(3) Both Active and Quiet sections of the front are represented in the MOD with different mission types for each.
etc...

A more descriptive list of OH's MOD changes can be found here and here.