On the whole, I'm intrigued. For some people who have gotten more into gothic stories (via comics, unknown movies, etc.), maybe Carnivale would seem a little repetative. But then, so is everything, technically. It's all been done before in some manner. It's a matter of re-packaging and putting a new spin on it.
This is certainly something that we haven't seen on the networks.
The Absinthe made sense to me. In popular media (and the show is destined for the masses, not for the goth subculture or those interested in it), Absinthe hasn't been that visible. A few movies here and there, most notably Moulin Rouge. It was appropriate to the setting and time, and to the character. And it was a plot device...a reason for Samson to dismiss the seer's claims after having read Ben's dream.
As for nudity...I wouldn't call that gratuitous. There was little when Sophie was being accosted and there was a burlesque show. Both appropriate to the story, and both where nudity is a part of the story. Now, if they start flopping body parts around for no reason, then I'll be disappointed.
Also, I would hope that I'm not in the minority as someone who hopes to God that Ben and Brother Justin don't turn out to be father and son. Been done. Been done better.
Mostly I'm interested in the peripheral character. The Reptile Man. Iris. Sophie's mom. If I've learned anything from HBO series, it's that while there are typically 3-5 "main" characters, it's the peripheral characters that really make the show worth it.
I look forward to finding out if Ben is the cause of the Dustbowl drought. I look forward to when and if Ben heals Sophie's mom (thus making his powers known to at least some of the carnies). I look forward to (hopefully) continued ambiguity in who is the bad guy and who is the good guy. I like it gray sometimes.
Shiv