Enemy AI and builds have improved, and they'll ram that down any captial's throat pretty hard(though your own AI is still a potato).
(AI's the same on both sides...
)
Not trying to be saucy, but that doesn't meet the observation standard from my big bad N of 1. If I have your attention, I'm actually quite curious!
Looking at vanilla only (nex has been intriguing me lately):
A) [REDACTED] do not have the standard AI, and no combination of commands and officer personalities can replicate how they behave to my own satisfaction. In vanilla, [REDACTED] and {INCREDIBLY REDACTED} are the two situations for which you really want to bust out capitals, and ironically to me, seem to be the situations they are weakest in.
B) I suspect that enemy fleets are run by an invisible 'fleet commander'. It seems, based on how fluidly they behave, that this invisible fleet commander has an absolute metric ton of command points. You can replicate how enemy fleets behave, but you don't have the command points to come close to the sustained behavior.
If these are in the ballpark, then I'll stand by the statement. You can't replicate the best behaviors and thus the distinction is worthy of merit and consideration. If I'm spewing nonsense, I'll just chew on the foot in my mouth for a while.