There isn't really a thread for this yet, so I decided to create one. I wanted to focus on things other than bugs, since most of the GUI is going to be scrapped anyways.
Two things I noticed right off the bat were both map related. On map generation you can see the mark levels of the planets, which seems to give the player a bit too much information about their environs, especially since you could just screenshot it and have a filled in galaxy map.
Second, I noticed there seems to be a lot of Mk I and IV planets, and not a lot in between. Probably something that will be tweaked in later balancing, but it certainly is an immediate wall to any player looking to take out the scramblers, especially since the planets have 1000+ ships on them. Again probably not a huge issue at this point but noticeable.
Finally, my roommate's first comment on seeing the game is "It looks a lot like Homeworld." He has a point, the art style certainly seems inspired by Homeworld, although I'm sure as it matures differences will become more apparent. You are probably well aware of the similarities, but I thought you might be interested in someone who has not been following any of the games development's first impression.
That's all for now, I'll probably add to this after playing around a bit more.