If you are going to replace a side, it should be Korea.
1. I hate Korea
2. I love Cuba
3. The allies have 5 sides already, the soviets have 4, yuri 1. It would be better with allies and soviets have 4 sides, yuri 1, and your new side.
We have talking about this one and we decided to change Korea with Australia. Although I also think it sucks in a way.
Chrono to powerful unit
Mind control powerful unit
Powerful unit dies
Chrono to another powerful unit
Mind control the other powerful unit
powerful unit dies...
And it keeps going like that. It would just be too powerful.