Epsilon was a pretty dominant force between i46 and i49. However that doesn't mean the games between them, broder and crack clan weren't some of the best tf2 I've ever seen played. Even though broder and CC kept losing it was really exciting to see them slowly catch up to epsi over the seasons.
The scene isn't dying because a super team rolls a season or two.
Sometimes you just gotta give the other teams some time to narrow down the gap and figure out how to counter parts of the super-team's winning strats, etc.
EDIT: Guess numlocked beat me to it by like 3 minutes. So much for refreshing threads before I post in them...