I agree - maybe a 4 x 4 battle map to start with? Not so large that units get lost, but more scope for maneuverability.
My wish list for future campaign developments, to be built in this order:
1. Barbarossa, with German and Soviet campaigns for AGN, AGC, AGS and Operation Typhoon.
2. An expanded Operation Blau, to include the drive to the Caucasus, Stalingrad (small maps with factories, ruins, etc.) and the Crimean campaign.
3. Kursk
4. Bagration
5. Hungary and Berlin
6. Poland 1939
7. A full strategic level map (a kind of Matrix WitE-lite) that allows the player to choose his path to victory or defeat. Andrey could partner with Gary Grigsby to produce this
I think that Graviteam should stick to the war in the east because this is their main strength. If they shift to D-Day etc. then they come up head-to-head against CMBN and the Russian 'flavor' of the Graviteam game, manuals, support etc. will taste a little strange.