You have not? I am not sure what you think that image you linked shows but it does not show a fleet of frigates with the enemy logistics between it and the enemy battleships.
Do you see how the lack of a “fleet order” means that logistics ships cant be “last”?
That image shows that fast ships can simply go around a defending fleet. Before that it was stated that they can not.
Not the "last" but "vulnerable to attack from outside".
They can go around. In your image, you were facing off with a duo of cruisers in the rear line. You legit went around and hit a cruiser formation.
This is "flanking the fleet" to you. You have gone behind the fleet only to run into the rear guard. Your ambush strikes, hard and fast, only to break against the rock that is two cruisers.
You made no such flank, that picture is a brilliant example of covering your own logistics- You want to pull from the game? If I was commanding that fleet, I could click on your fleet and turn around, since any smart commander will have noticed your lurking sensor blip on their scopes, even if your flanking fleet was frigates.
Your argument that I cannot affect my own fleet layout is valid but irrelevant. While I cannot directly affect my own fleet posture, all one has to do is look at the fleet in the campaign screen and notice that they have, all of their own volition, formed a mutually defensive sphere. All of my tactics and maneuver explanation was simply to tell you how easily a fleet could enter the standard engagement instead of your "ambush".
In your First World War example, the cruisers didn't have the detection range available our fleets. At the same time, what they fought would be described as a standard pursuit battle in starsector. None of that Cruisers running to save the logistics ***. The fleet was arrayed properly and struck in a nighttime assault impossible in space, by 58 vessels, 21 of them destroyers. They faced off against the Russian battleships escorted by cruisers. There was no scramble to get to the logistics ships. There was no fast gun battle- the attackers pretty much shoved torpedoes at the Russians until they ran away.
Besides, if you wanted to use that as an example, i'd like to point out your fanciful thinking. You sir, are now skipping over the facts from real life battles not even in remotely the same circumstances. The Russians had no detection or targeting, something Starsector fleets would have had in abundance. Hell, the Japanese only got hits because the Russians were trying to use spotlights to find the small craft. In daylight circumstances, your example battle would have gone much differently. Ships of the line of the day were meant to close in and blast with fast-firing secondaries, also effective against small craft. With daylight facilitating proper communications and maneuvering options, the Russians should have been able to give the Japanese a hell of a time.