To be fair, I didn't think S2 was all that bad, it was a mess for the most part, but it had it's good parts. It certainly didn't live up to the standard that S1 set.
And I'm not saying they have to do the same thing every time, and S2 wasn't bad because it was different, but right now it seems like they're cargo culting themselves if that makes sense. Taking some iconic things from the first season that a lot of people say they loved (even though it wasn't the only stuff that made it great) and repeating it because it worked then. The whole interview and several time periods thing for example, if it was present in S2 then you could say that it's a sort of hallmark of the series, the way it tells its stories, however different they might be, something that makes you go "That's a True Detective thing". But they haven't, and that was fine, different approaches for different stories and everything, but then they go back to using the same thing again because that's what folks remember the first season for?
Dunno, hard to completely put this into words, I'm just having a wierd feeling about the whole thing (mainly that they got lucky the first time and are now scrambling to repeat the success without knowing why exactly it was successful).
Still, one of the better shows out there right now, despite all that and I'm definitely looking forward to the rest of the season, just got some mixed feelings lurking about.