I'll go bottom to top so i dont have to scroll as much.
As for the picture, the first two are correct, but the future design was meant to be in space, where it would not have to contend with rough weather on the high seas (i think).
Although it is true that naval architecture is a form of technology, the original question is moot if the ships are of the same design anyways. 30 years of advancements in naval architecture add up over time.
Although you are correct about not armoring its bridge AS MUCH as other battleships of its era (the Iowa-class had enough armor on the bridge to take a 16 inch shell without damage to the interior, beyond shock, etc), the Bismarck's fire control centers, and the bridge were armored (this is as much a reflection of the German fascination with armor over firepower as anything else). On the other hand, the bridge of the Dreadnought wasn't very well armored at all, and "fire control" stations were pretty much the crow's nests, while the KMS Bismarck had separate stations for each of the 2 fore and aft turrets (theyre the funny-looking things between the turrets and the superstructure).
As for turret positioning of the second to last turret (the British letter their turrets, as do the Germans, while the Americans number em), I can't prove you wrong specifically, as I don't know the maximum angle of elevation the Dreadnought's turrets were designed to achieve. However, i can say that this turret could not feasibly have been able to fire forward, as the barrels of the guns themselves would hit the superstructure. As for firing aft, once again, since i don't know the turret elevation of Dreadnought's guns, you could be right. However, i would guess that the elevation wasn't higher than 45 degrees max, which would end up shooting right through the aft crows nest if fired directly astern. As it stands i would guess that this turret probably had about a 200 degree angle of fire, spread out over the port and starboard sides of the ship. (EDIT: Maximum elevation of the Dreadnought's turrets was 13.5 degrees above flat, and could be depressed 3.5 degrees below flat. Therefore, it is impossible that the Dreadnought's second to last turret could have been used for anything save off-angle firing and broadside combat)
As for your first point, that question comes down to how the battleships were intended to be used. In old-school naval warfare, all the commanders' wet dreams were about broadside to broadside combat, and this is exactly what these ships were designed for. Therefore, although you may be correct that the Dreadnought had better fore-and-aft armament concentration capabilities, this was not the type of battle it was designed for. Also, as i said, the forward 3 turrets were often very miserable places to be in rough weather, and while not making them unusable, made working in them slippery, cold, and difficult. And finally for the consideration of the stern. Even if both battleships were equal in speed, a commander would never willingly turn his stern towards the enemy (as the armor belt of most battleships was concentrated along the sides, in accordance with the broadside to broadside doctrines of the day) unless he was losing the battle, and if he's losing, then usually the battleship has more concerns than maintaining fire on its opponent (casualties, repairs, squeezing the last possible drops out of the engines), and since Dreadnought was a coal-fired ship, oftentimes men in positions of less importance would be "drafted" to go help the stokers with shoveling the coal.
However, your statements have pointed an error out to me that i should have noticed in my last conclusion. ASSUMING that both battleship commanders fought like their ships were built to fight and how they had been trained, then Bismarck, on an equal footing with broadside power, and advantages in sea-keeping and fire control would win the day. HOWEVER, if the commander of the Dreadnought was particularly bright, or the commander of the Bismarck particularly dense, then the Dreadnought COULD win. But, given the design of the ships and the training of the average battleship captain, i doubt that would come to pass