I don’t agree with the two space rule change for land units. Land units in World War 1 were not mobile and if you are looking for a game with full mobility the original axis & allies WOII games are a much better choice.
However I do see the potential of limiting the capacity of producing units in India to 5. Playing UK is much harder as you have to keep producing units in India to keep the Ottomans away and also have to build a navy in the west to threat the Germans. The UK simply lacks the IPC to help the Russians in this scenario since a decisive victory against either the Ottomans in the East or against the German navy in the west is very hard to accomplish. In the two games we have played with this rule Russia Revolution has occurred.