I somehow agree Matrix has not a deep interest in M-WiF, the game being very of niche and they got the cash already.
Meanwhile I've a few titles of Matrix Games anyhow they are hardly producing new WW2 games of my interest (War in the West I've carefully avoided after the War in the East experience I had.); and the other titles churned out on WW2 Grand Strategy that resemble tabletops are pratically Strategic Command remakes in different form but same concept (Time of Fury, and company). I dare say the only worthy one around here by Matrix Games is the pretty old Gary Grigsby World at War. (Yes, I like production and grand strategy, more than the tactical details of a scenario I can go through all over.)
On the other hand I believe Mr. Shannon has made the project something personal, as someone defined it - a hobby. Which probably as long as he can, he can keep working on. Because a hobby is a passion.
I believe Matrix has bigger hopes for this, I think somewhere I've seen the label "World in Flames product one" in fact - that suggested if the sales went well Matrix could have invested in a deeper effort and possibly to try to get more cash later on with expansions (America Aflame, etcetera). Marketing results probably not warranted the effort in a larger project being desiderable from a Company standpoint.
In general the issue is "how much" a game is immediate, and the customers can get a grip of it and play (Just imagine the comparison across DOS-OS, Windows and Unix. Most of "players" use Windows. DOS is old. Unix is more demanding in terms of knowledge). So a Company go for what people wants - a game to play easily, at immediate hand (read, Panzer General clones for example, which by now we've in all sauces, from Panzers of WW2, to Space Marines of WH40k, and so forth). WiF is not that kind of game.
Therefore I'd suggest to all the players who bought MWiF, enjoy it as it is. Arrange your games with others via Skype / Teamviewer; play solo; shelve the game and wait if you prefer ... but the wait will be long due to the "resources" committed to this project.
I know I've spend 100~ euros about for a game - paying for manuals I am not really needing (the PDFs are more than enough); so I best get my fun out of it. And that is what I suggest everyone, the game is playable, with some house rule and maybe adjustments of fair play. Seek out someone from your timezone, and arrange some weekly session for it, the juice of strategy games is to play against another opponent, a human one.
My analysis, my advice.
Matrix's free to prove me wrong obviously, and maybe in a month announce America or Patton in Flames, who knows.