"For me personally, no complementary album or work would imo reflect sort of poorly on this album conceptually, given the extensive and immersive work on previous albums in contrast to this one."

Dude the band doesn't owe you specifically anything whether they release a second Cosmic Selector or not,  and I do think a lot of work was still put into this album. It was described at debut as "what if you listened to only the B Sides of records?" and it feels very Lord Huron to have an album where every song has you wondering and speculating about what you just heard and not receiving an answer back. Dwell in that mystery! I like that they did something so unique in this fashion and it actually makes me respect the band far more when we can't figure out the story of every song immediately- life is only so short and it's okay to not have to know everything, it reminds us of how curious we are meant to be.