I think you clearly did not play through the game. I won the game and know that this game is much deeper than you think. Changing to zombie form is very important in the late game and there are many hidden mechanics to discover.
Well, no one said our opinions would align 100% all the time fair enough though guys, thanks for taking the time to offer up a counter point!
Edit:Turns out Rosh didn't spot that you could willingly turn Zombie and continue playing the game from there. Judging from our conversation, this may be another area where the game fails to explain itself since we didn't realise going Zombie was even a legitimate option.
"Determining the appropriate level of influence in somebody else's war is never a simple matter."
- Special Circumstances