What was changed are said below.
You don't need to manually move every piece of equipment from backyard to front line HQ.
There are now hubs (each side has 2) when produced equipment comes and with TOE it can be sent automatically. AI fights as standard ATG AI. Nothing brilliant, but it works. Scenario can be treated as functional Barbarossa game. Probably it can be played longer but no scripted reinforcements will come after 30 turns.
1. Now transfer from capital HQ works on almost all territory (2100 hexes). Command structures cleared (most "Railheads" removed).
2. PP are added by events it is used for construction of new factories (the only way of aquiring PP are automatic events from round 2). Right now the only possible industry to create is basic supply base on SUBURBS terrain. (more will be added in future)
3. New Railheads +1 train all + 2 inf. They are not used for transfer anymore, but can be very helpful during winter and autumn months as supply centres (if you sent to them supply first).
4. Added cadre units for both sides (25% chance) as a base to used them as needed (mod will not allow creation of units the normal way). Maybe not necessary, but can be helpful.
5. A few cities names corrected (spelling, cosmetic stuff).
6. Hex attacked value increased from 100 to 135 to allow 2 full GER inf div to attack frontally. Units in mod uses more stack points than in vanilla game (hex attack was 100, but 66p inf div + 48p pz div = 114 = 120p)
7. Now Factory 21,83 produces HUN Toldi tanks instead of GER Toldi.
8. Jager/mountain units have terrain bonuses in both attack and defence .
9. SL and CR Wagon added.
10. All units have 15% chance kill to became retreat (some had more so still have).
11. TOE enabled. Some units are set up, some still need to be done by player as he wishes.
12. Counters changed.
13. All GER AA should be now Luftwaffe (as there is no city with GER AA production).
14. Distance from HQ when power is 100 changed to 5 (from 3).
15. AI values updated. Not that much though.
16. Anti supply parameters of air planes modified (less and shorter).
17. LANDCAP is provided by staff units. RAILCAP by trains. That means frontline HQ can send troops to units outside rail line.
18. Normal structure of HQs. I mean supreme (north/south) hub and all belowe belonging to them. Easy to spot troops, easy to see supplies. If one attach front to railhead (something that has anything other than NONE as HQ) then structure will revert to former mess

19. Many supply spots added to Soviets between Moskwa and Warszawa. If they start loosing them (as it was) supply will be scarce. Treat "supply"as resources for industry (supply produce fuel which is used in creation of troops). It feeds armies and it will be needed to move mechanized units.
20. AI roles of STFs adjusted.
21. Fuel added. Fuel is produced from supplies. There are none oil fields. All mechanized troops and aircrafts need fuel to move and fight. Industry needs fuel to produce stuff too. I really like this concept. You can now choice of using fuel for fighting or producing. The same fuel.
22. Some terrain graphics were changes. I think is a little prettier now. Nothing of graphics used is mine. Just took it from mods on my disk.
23. Added many river names.
24. Added many woods in Poland (did you hear about partisans in Poland? - woods were home of them).
25. GER don't have enough supply spots to wage war. Soviets nearly has. So GER needs to capture those to feed war. As it was.
26. Wagons no longer climb High Mountains. Use mules instead.
27. SS Pack Mules added to production list.
28. NKVD machineguns and mortars show on production list.
29. Added CV-35 Tankette to Italian production list (cheap recon).
Resume: still no Finland, no ships, no officers. But it plays like good Barbarossa game.
If research gives you some new STFs, still old one is available. You need manually set up production.
There is probably too much fuel on board. Units should consume more, but it needs testing.
Bugs: when reinforcements come, there will be mess in SOV command structure. One just need to re-link those units to frontline HQ.