Okay, having played a game that lasted 250 rounds and still going, I've managed to playing a non unrest race to get an OK economy with some ships, even tho I'm surprised how few ships you can afford to build really.
That said, the combat itself is strange, the AI is a Muppet and missiles for the win while beamlazors sucks on all levels. Also target priorities needs help, I'd prefere if my ships actually shot at other ships in space, and let those silly baboons on the planet be. Planet combat was done best in Moo 2, and all in all its unnecessary aspect in this game aswell, I'd suggest removing it in favor of better space 'terrain'.
Strategic AI, I don't know about you guys, but he's not doing so well, at hard difficulty I was rarely threatened, nor did he seem to have any 'plan' besides buzzing outside my planets with tons of fleets with 1 ships in them.
To date the largest AI attack, consisted of 20-30 assault ships, which didn't help him much.
Also, the AI is spammy, I don't want diplomatic messages from him when he has -nothing- to offer me in trade, just asking for a tech I have while having no counter offer, is a waste of my time.
Luckily for me, the warlike trait gets rid of most of the spam :)
Last few things, if combat is supposed to last several turns, and stuff, then 1 shot missile kills and those missile ships with AOE damage needs to go, or see a nerf, entire fleets vaporize in seconds. Also its hard to maneuver , and asking a ship to 'attack' another, leads often to it doing nothing.
There be more, but thats more nitpicking.