You're gonna have to keep watching. At this point you are asking for spoilers and I'm ready to spill.
I'd say Six feet under is about a 5, nothing special but I needed something to watch and was pleasantly surprised by the end. Its an interesting subject and Hall got Dexter due to nailing this role. Anyways, From went from around that score up to about an 8.5 by the third season. It is the best show on TV, rn imo. None of your questions really matter because it could all change by the next episode.