There is one thing I'd like to mention about the Advent's Discord battleship.
Its behavior with regard to Psionic Scream and Fracture is way off.
It prioritizes PS over Frac at all times.
That means unless one babysits all Discords in battle, players lose out on a big chunk of what PS does.
The AI behavior needs to be changed so that PS won't be used unless nearby enemies are still under the effect of Fracture.
As for the TEC starbase, it should be a tad unbalanced. You're losing a whole starbase to get it done, so it'd damned well better have a huge payoff. As it stands, I've never once used it. I just focus on making my starbases that much harder to kill because Big Red just wasn't worth it at all. Now, it might be...MIGHT be.
The Vasari will be available when the rest has been balanced enough. Besides, we all know already that there will probably be a few patches throughout the year after release as well. We'll probably get the Vasari long enough to work the big bugs out, and that's it. The rest will be covered in post-release patches like always. I certainly hope the Vasari are available soon, but I still have to say that people are just being whiny about it.