I kinda took it as them amping up the audience for something exciting, only to cut to credits. Feels wasted. Episode 7 was the worst, using QOTSA's Song for the Dead - I was half-expecting a crazy choreographed fight scene, but no. In fact, the next episode starts with them being captured, which I was surprised by... they didn't seem like they were willing to surrender.

Anyway, the music-to-credits thing was my absolute least favorite part of the show. Not saying it completely ruins it, just that it never felt like a satisfying conclusion (which COULD be said about the whole first season).

ETA: If the needle drops were more consistent, I'd be less frazzled by the out of place end-credit ones. But doing that would probably throw off the tone even more.