Hello!
Thus far, I've been enjoying the Advent rather greatly. I have a couple of thing to mention, though, overall, none of it is massively important or bug-related. Please keep in mind that this is primarily opinion-based, so it is more a qualitative feedback.
1) Request: Please include 2 new player options during setup: Random: Loyalist/Rebel, and Random: Race. The reason is because I often want to face-off against opposite opponents, and I want to make certain I am against (perhaps) one of each race, or only loyalist/rebels. Minor thing, but I thought it would be handy.
2) Pirates as slider bar. Rather than a pirates on/off, something where we move from 0 to 1 in terms of pirate strength and upgrade speed (similar to Neutral Colonies slider in Galaxy Forge) would be nice. Even as I type this, I am thinking back, and this may be something that was added as different steps (Off?Easy/Normal, etc... I'll have to check)
3) Advent Rebels. I realize that all races/factions have an equal distribution of new abilities/research, but the Rebels (I think, the ones with all their research in Civilian tech and cheaper Culture Towers) feel a little to "vanilla" Advent. They get the resurrect tech, but the rest come online so late that it isn't all that noticeable by then. I feel that, possibly, reducing the impact of a few to lower percentages and moving them earlier in the trees might make them feel more "new" out of the gate. Also, giving them some War tech wouldn't hurt. They just feel a little plain compared to the other faction (in my opinion, again, qualitatively, here)
4) Big Red Button Titan Power. Not a fan (especially since it is a high-level power anyway) -- perhaps something that would allow a "Memories of the Fallen/Retribution" power that allows the fallen Titan to be "rebuilt" for free at the facility -- or upon death, the Titan distributes it's XP to all friendly capital ships in the gravity well (50%/100% at Level 1 or 2)? That would be neat -- or, at least, to my mind, of more utility and still fit with the Advent theme. I dunno, just spitballing here, but I wouldn't mind that power changing into something else.
5) Minor Nitpick. The "Beam of Destruction" power for the Loyalist Titan that increases with nearby ships... what is meant by "nearby". Also, lacking a better definition, could ships contributing have a glow around them or other visual indication to show me what's up? This may be a particle count issue, but it would be cool.
6) Late in the game, I keep getting Structure Build Time bonuses to a majority of my planets, but I have no idea what it is coming from. A mouse-over infocard or other helper to help me understand where/why bonuses and penalties are occuring would be awesome (may make things way too busy, I realize).
Other than that, all I can say is: I'm liking it!
Dav