Summary: there are better rts games and single player gets tedious. Probably not enough depth to satisfy the die-hard 4x fan.
This is a review of Sose with diplomacy & entrenchment addon at 1.30 against the hardest ai.
While i had no real difficulty in jumping straight into the game the documentation of some game mechanics is a whole different story. That requires searching through the Sose forums and even then most people are not sure how shield mitigation works.
Micromanagement is not horrible. At the beginning of a game though its seems like the main thing i do. The autoplacer needs to build all the defensive buildings as close together as possible.
The game's real downfall are the few number of strategies available. The strategy doesn't change because it is optimal and only diplomacy can alter the militancy to economy spending ratio. Also not many tactics and watching a battle too long over watching empire is inadvisable.
Build trade ports for what amounted to as double the income. Only build capital ships. They can be expected to survive even a loosing battle and so wont cost resources to rebuild. Attack enemy empires that get too close in ffa over neutrals. If you have destroyed a large part of the opponents fleet take some of their planets. Build lots of the basic beem defenses. A fully built up space base is indestructible. When defending fight at your defenses.