agree with apenpaaps assesment.
I also find comparing it to b5 somewhat unfair , both were similar in lots of ways but totally unique.
The season was by far stronger than the previous ones and the level of increase you awarded is well short of the difference in quality in my opinion, The gap in rating should have been bigger.
The muse was the worst show of that season.
As for The visitor...yes it was a class show but its your typical standard winner that most would pick, well written etc.. but for me the homefront/paradise lost & way of the warrior are more important to the series, and are among many outstanding episodes of that season