1. It does not double the speed, it increases road movement by one, as has been pointed out several times. You seem to have missed that citizens input everytime though.
Well, if this was the case, I am sorry that I did not specify that particular point enough, I should have written 1/3 extra movement.
1/3 is still plenty of reason for me to support engineering.
Then again, the real problem here is that you are not too concerned with either Daveshacks poll for rethinking the game or with Tanktunkers polling standards, as long as it carries your agenda to let criticism stay silent. I support the democracy beeline, but only when given room for other policies in tandem with it.
2. The speed of reinforcements has almost no effect on the speed of the war, as most of our troops are inside enemy territory, or so close that the extra movement won't save anything.
The road movie is key for having a follow up war with Rome, where the troops will be redeployed much faster. I see that the war may go faster with a quick follow up war on Rome. Build needed units to win and be done with it.
3. The speed at which workers can improve our empire is not influenced heavily by the road movement. Engineering will only have effect when workers need to move more than 4 tiles over roaded terrain. Even then it saves 1 worker turn. Workers seldom need to move very far, so the effect is tiny.
The effect is as tiny as you decide, of course, I cannot make you think along the same lines. The point stands, the quick allocation of workers south-north is key in this game. Even a tile faster movement helps.
4. It is a detour, only a 3 turn detour, but still a detour. Why make a detour without a good reason?
To be correct, it can be a 2 turn or a 3 turn research route. It is not a detour.
5. Pikemen are a useless unit against the longbowmen we'll be facing, knights and macemen are much better against them. I doubt we'll ever have to build a single pikeman in this entire game.
You are putting the cart before the horse here. I never intended to use the pikemen in this very second, for the German War, but for the upcoming Roman War, as they are likely to get knights and other things with the speed the recent wars have been going. To be very honest, the game has gotten one-sided this term, and someone might just need some healthy opposition.
The tech office is getting worse by the day, and the military seems casual about how wars are run.