I feel the 8 speed is too low anyway.
It's needed to stop AI Carriers. Stopping CPAs (which include a butt load of carriers) has become a contest of "how much heavy countering stuff do you have". A full Carrier is almost as scary as a Mark II hunter killer. Or Mark I H/K at least. If player's gravitational stuff was nerfed Carriers should have their health reduced and hull changed to scout. Fortresses' damage penalty vs scout hull should be removed in that case. (This has been discussed before)
Ok, let's be honest here =), what I really feel is that the gravi turrets is cheesy, especially with the lastest years of "let's add radar dampening to a lot of stuff". It enables the player to shoot way larger things in defence than what is possible when attacking. The player should have enough of an advantage with simply mines, turrets, tractors, fortress and command stations.... but no, let's add also some "does not matter what the speed of opponent is" mechanic while shooting it where it can't attack back. So it makes for stupidly larger in my opinion. If it was only me, the speed reduction would (at best) be percentage based and ships would have a resistance to speed reduction effects, or completely removed. That's why I was proposing both gravi and logistical stack with percentages.
Sadly, a lot of things have been balanced around what I think of a really poorly choosen game mechanic. So it's here to stay if only for the amount of work which would be needed to balance the game again. I do believe the game would be better after those changes... but that's kind of not the point of this thread, and I don't have much to add about this. Most seem to like it the other way. Oh, and I do have the same opinion about radar dampening too - should be at best percentage based and at worst removed.
Back to logistics, basically around since the 4.0 I've seen and read that they were mostly useless, and... they still are. Maybe it's time they went away. I did not play the game much recently and lost the recent changes but... there is a "need" for what... about 12 stations max in a low AIP game anyway ? 6 military 3 + 5 warp jammer + home station is 12. Even if it was made a better choice, it would kick something else from being at the top. It's a never ending quest. To compensate, I'd try to convince Keith & Chris of the need to hack AI stations to get more choices of human military command stations.