[Endoperez]

Welcome to the forums, Korvin! This idea is one of the many expressed lately. You might want to move it to one of the two "feature requests" threads.

There is already at least one workaround:
Wouldn't it be easier to put in some normal, some aggressive, and some random nations? Like, playing against 4 AIs, 1 neutral and 1 aggressive would make pretty sure that you won't besurrounded by two defensive AIs. It only works if the nations are random, of course.