After reading over the whole 2 1/2 pages of the thread, I've just got the following comments to put in:
1: I haven't tried the new Plasma Siege Starship. Intend to do that after making this post.
2: I really like the idea of some "Deployable" weapon systems. Heavy, high-yield high-cost barely mobile weapon systems that can fill a variety of roles. I remember playing Supreme Commander 2 with the UEF Jackhammer Siege Tanks. They were useful in that I could place them as base defense turrets, move them up behind my army as a close-range artillery helper, or park them just out of enemy defenses range and have them go to work. Their versatily was counteracted by their need for setup/pack up times and slow movement speeds.
2: The sound of the AoE in forcefields sounds very interesting, but as mentioned before me, it doesn't seem like a very "Base" starship. However, as I have yet to try the ship, I'll reserve further elaboration on this until I have tried it and can speak for myself on the mattter.