I like the Titans, they are fairly well balanced but, with a one per faction limit, it would be nice if they didn't cost and crews or fleet points. The research technology certainly makes it understandable. I would also suggest renaming the four technologies. Titan Prototype Concept, Structure, Weapons, and Crew or something like that.
Also, for a full stand alone xpack, content feels sparse. There are fewer new techs for each race than in Entrenchment or diplomacy. Ships are largely the same. Graphics have improved but not substantially. Since the war has been going so long at this point why not add a tier 4-6 unlockable tech tree that allows you to build retrofitted ships and retrofit your existing ones (not forced) to new designs? There could also be an option to start in that tech tree. Corvettes have potential if you can divide them into interceptor, bomber and suppression classes. Abilities need to stack to become useful. I would also enjoy the ability to field more capital ships.
I know there is a RAM limit and all that for 32 bit processing but could you program a little more flexibility into the fleet sizes? Maybe extend to allow 64 bit players to have larger games? The processors are more common nowadays.
Overall the content is good, but betas allways need work and it doesn't feel like there is as much new as the hypes says.
Thoughts?