re : the AIs ship designs in my current game.
The AI is on Medium Bonus
The Vorlons are using Fission engines instead of their Ancient Gravitic engines, but no other complaint - they can certainly beat my designs weight for weight on Strategic Combat. They are the only ones I've seen with advanced armor (and they had it quick too, before I got Boarding Parties researched and built). No Self-Destruct devices though so if I had of gotten there earlier

Havn't paid any attention to their generators so I don't know what they are using.
The Grome and Yolu designs however are pretty poor in terms of their weapon loadout. I'm limited to just my Homeworld (+ treaties) and I'm packing Particle Concentrator VIIs, while the highest tech weapon I've seen on them are Medium Laser Is and Particle Cannon IVs.
I'll have a look at the enemy ship list when I get home - with all these Partnership treaties, that should be a faily comprehensive listing of most of the AIs' near state-of-the-art designs.