One problem that I'm experiencing with production and convoy routing is that once I get my convoy routes and production working at some acceptable level within the confines of MWiF it will "suddenly" change for no apparent reason. And by no apparent reason I mean that it will change when nothing else has changed (e.g., no changes in CP's at sea, no changes in control of factories, no changes in control of resources).
In the example I showing and the game turn I'm providing in the next post, I have to continually set to default two resources in Australia for production in Montreal and Toronto, Canada. If I change powers or close and then reopen the production form these "default" setting are once again cleared out.
In my example, I've got all factories and resources working at 100% for the CW, USA and Free France. However, and I think you'll see (or maybe you won't), when you open up the attached game turn that some factory, or factories, and some resource, or resources will have gone idle. I've gotten fairly good at fixing this again and again but I shouldn't have too when nothing relevant to convoys, resources or factories have changed.
One request I have, which I have no ideal if it's feasible, is to have a lock down feature that one can use to keep everything in production as it is given no changes to the big three (i.e., convoys at sea, control of factories and control of resources).