It's fun ?
More seriously, I won't have Galciv 3. It's another (dumb) moo-clone with an over-agressive expansive AI and (very very very) large amount of micro-management. What's good and innovative with star ruler 2 is that the game is far less tedious than most of the competition. Another thing is the links between planets to upgrade them. Basically they went with the idea of large developped planets having to be "supported" by the exports of "lesser" planets. And, yes, bugs are few and the game works.
Then again, sadly, most of the people in the space 4X hate the very thought of not having to manage 50+ buildings on every single of the 8 planets on 20+ different systems, wants to rebuild 8 different size of ships every time than a research finishes, and so on... If that's what you're after, and think that doing differently from forcing a player to make millions of mindless choices is "dumbing down" a game, then star ruler 2 is not for you.
That said, star ruler 2 is quite easy against the AI - focus seems to have been made on multiplayer, and games can be short (I generally finish in 3-4 hours, basically what a civ5 game takes me, more or less. Finally, despite no one reviewing it and people not buying it on behalf of star ruler one being THAT bad, they got enough money for a single expansion to be done, so we can expect more work on that game =).