yeah there have been a ton of shows that are good into their later seasons. don't people say it's always sunny just had its best season? true blood and how fragmented it is just doesn't lend itself well to a long run. it had a chance last year to start over but they keep building and building and the best stories are getting less and less time and shit is getting out of hand.
even the creator, alan ball, is leaving after this season. and he wrote last week's (way better than usual) episode.
i literally don't know what's going on in any storyline. no one is acting in a way i find believable. sam can smell emotions from people that were once in a room? don't get me wrong i'll watch this show forever cos it's dumb and fun, but it's not what it was.