Yeah, I'd say this is a producer's job as well - there's plenty of hands-off producers who don't touch the songs, structurally.
The most telling aspect to me is my consistent need to turn up the volume during my favorite parts. I should feel surrounded by the music - not that it's being blasted at me. But, at the end of the day, it doesn't affect my love for the record.
i think its pretty telling how strong the songs themselves are that they're able to (for the most part) overshadow the production end.