The two actual 'issues' are these:
- Texture pop-in. But this will (probably) be fixed with a day-1 patch.
- AI intelligence. First off all, it isn't bad. There are moments where AI can be really good. But it isn't always perfect.
Here's the thing though, as said - the game is for specific people. If you are gonna play SP only then you are doing it wrong. Brink is a MP game at heart.
So everybody just calm down.