The map was not designed around both teams being enjoyable. Sheep, to the great majority of players, is not only more enjoyable to play, but a lot more enjoyable to play than shepherd.
However, I agree with Spoofy. It ultimately doesn't matter which is used. However, if it was reverted to original (first team + 1 second), the first team to play sheep should be random. This would cure much of Sidey's complaints if played over multiple rounds, etc.
Also, both can be used. You just create another -command that does time+1 instead.