I just wish the AI would expand out methodically from it's homeworld so that the galaxy would end up with reasonably coherent boarders. I hate having AI planets diffused throughout my empire and each others empires, it is quite idiotic.
Why idiotic? It is certainly something that I would consider doing in a multiplayer game, in some cercumstances, to limit my opponents opportunities and to be generally disruptive. Especially if I thought that I could pick up the closer to home planets fairly easily later.
Note that I don't believe that the AI knows how many opponents there are until its faction encounters the others, so in the very early stages of expansion it is exploring/ expanding as if there were no opponents, or at most assumes the potential for 1.
drrider