^I caught up with the licensed Eng version of the manga and have been reading the LN sporadically, I think the expressions, blushes, gazes and sighs which highlight the personalities of the characters (and, probably relevant and important around here, crank up the yuri-ness of the interactions in the otherwise non-yuri setting) are better conveyed in the manga than LN, and the manga has been adapting quite faithfully, so you won't miss much if you just stick to the manga (except for the story progress, words are quicker to publish than drawings illustrating those words). The writting technical quality is fine, nothing exceptional but not bad either, and the story itself is entertaining enough.
Ultimately it's inner court struggle genre, with some magical components (no yuri ending), if you like the genre I'd recommend it, it's one of the better in the genre.