However the trouble is, that units can wait for the second time (e.g. Restoring this function allows the player to press the W key and place a unit into the bottom of the turn order for a round, effectively making them go last.
Still it can be an interesting addition to a multiplayer game. It's possible to bring this functionality back to the game, however only human players can use it, getting a great advantage against AI.
The 'wait' button can be seen on of some prerelease screenshots.