Well, some impressions here, also. Of course the engine is not the one from AACW etc. In reality, and as I expected, it is probably the same engine, although certainly improved, of Great Invasions (Calvinus's work, also). This for the good and unfortunately, it seems, for the bad, also, as some of the problems that are being mentioned and I also found definitely remind me of Great Invasions.
first, my specs: WinXP SP2, Intel Core 2 Duo E6550, 2 Gig DDR2 Ram, 1Tb disk, ATI HD 2600 XT with 1 gig VRAM. 19' screen, 1440x900. Security to 2, the rest, default options (namely no extra time for AI, etc)
Some thoughts:
1. Yesterday I fired the game. Nice intro video, with good music. After I played a bit (more on that later), last night I loaded again the game and got a black screen. Hit Esc, got to the main menu and quitted. Went to the config, and disbled intro video. Tried again and it loaded fine. Exactly the same problem, IIRC as with GI

. Why, I must ask, do you insist in using Divx for the intro... ??
2. Scrolling the game is mighty slow. It got better if we select to load all map at startup, although we must wait several minutes for it to load. Some engine improvement definitely needed here. This is not Crysis after all (thank god)
3. First game, true to my word, Serbia scenario as AH. I managed to get a minor victory

... But I do not know how, really...

.
Main problems: Poor interface design (IMHO) and feedback for the player.
- Why it is not possible to access the options via the main menu, before we start playing ?
- On screen buttons (specially those next to minimap) too small;
- It seems to be difficult to know exactly what is happening and what we shall be doing. Deployment phase ? Nothing seems to happen ? Available armies ? how to quickly find them and scroll through them ? Reinforcements ? I got some new armies, and according to screen indications, I should drag and drop them; but they are not "draggable" ?
Battles ? Why the graphic decision in small battles to put those ugly "X" s on the right side of the screen ???; and no clear indication of end turn, and result... in the end, I kept trying to engage again (and the little brains were there, aparently waiting to engage, accoding to the tooltip), but in reality what I had to do was click on the "next battle" button...Siege of Belgrade ? I was not able to deploy any of my corps, and I do not know why ??
4. Unfortunate decision to have in the initial release a buggy GC playing as only one nation. I know that it is on the works, but it was clear in the forums the interest of the players in playing as one nation only...
4. Finally, after my Serbia try, I loaded the GC scenario as the Central powers. Got a CTD during scenario loading...

. although in my next try, reloading the game, I was able to start playing... and went to bed
Nevertheless, the (un)fortunate thing for me is that due to "real life" I do not really have time to seriously play this in the next couple of months. Maybe then we can have a better game.
Regards