Oh, I guess there's another escort-type behavior I'd love to have that the current AI can't do. Specifically, I'd like to be able to take a frigate or destroyer, and set it to follow along behind an Onslaught, specifically to chase off annoying frigates trying to get into the Onslaught's tailpipes. In this role, it doesn't even need to go for kills or anything - just push up flux on targets and make them back off.
This is one of the things that makes the Legion a bit more appealing to fly than an Onslaught - even if you've just got talons for your fighters, you can set them on things that try to come up behind you. (Well, that, and the Legion's firing arcs are a bit less awkward.)