(Moved this to Suggestions because AI things generally belong here unless they're *extremely* clear-cut.)
I'll keep an eye out!
In general I think some of this may be a question of expectations/interpretation. For example, #1 - they shouldn't do any kind of long U-turn unless it's to avoid nearby enemy ships. #4 - they aren't "bad" at it, rather, they don't do this at all unless enemy ships are relatively nearby! I don't think trying to plot out a retreat course to that degree is something the AI can/should do; it doesn't plan that far ahead in any other situations. #2, map boundaries are tricky in general.
If you're able to describe a vanilla simulator scenario where, say, #1 or #3 happens reliably, then I'd be happy to take a closer look! Generally speaking, for AI things, working off a verbal description just isn't enough, since so much is subject to interpretation and the AI could be doing any number of things for any number of reasons. But if I can see the behavior in-game, that changes things drastically and turns it into something I could actually address.