I’m not expert by any means but my 2 cents would be…
Cost structure might be an issue. In 42.2 I think cost increases to compensate for the fact that the map is larger, and the mobility becomes even more important than before. You might need to play with the tank = 6 vs 5 and see whether it makes more sense to keep the original price. The same to AC as well.
Map might also be an issue. In 42.2 the map is bigger and the cost of specific land is less. In Revision, let say using default 42.2. setup, Japan would have much larger incentive to build a factory in China using revision map due to larger production value. Not necessarily a bad thing…but will be interesting to see how this impacts the game.
In 42.2 Germany seems to start a lot stronger, and in revise edition due to smaller map, weaker Germany setup (?) it will be interesting to see how things go…
Post after you have some games tried out :-D Have fun