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Well, the easiest response to like 90% of the complaints is: "We wanted to focus on the single player aspect" The only major problems outside of the many multiplayer issues were the AI/Pathfinding and engine optimization. As long as you used the top down view, the camera wasn't really an issue.
Oh, and to the topic of the reviews getting worse, as both threads on the topic have been closed: I find that all the negative reviews tend to be like "this is awesome, this is awesome, this is awesome, this is awesome, this is awesome, I can only get 12 fps. 5/10"