The CP won the game for various reasons.
An inexperienced player was France+UK.
Russia made a mistake on its southern flank that allowed the ottomans to can open for the AustroHungarians.
The bonus units were probably too much, but it was very fun having a sub pop up for the axis once in a while and the implications it created for the allies.
Their usually guaranteed naval dominance was nibbled away at.
The more free units they got as the game went on, the more it became too much for the allies.
I may change the rule to a one time roll at the end of each CP turn with a chart like this:
Once per game you can roll on the special Centeral Powers Conscription chart
1. 2 infantry
2. Infantry + artillery
3. Infantry + fighter
4. Sub + infantry
5. Sub + artillery
6. Cruiser + infantry