ok i might be talking complete nonsense here, but. the Strict Order as a metaphor for an author facing writer's block.

"the Strict Order abandoned the world," yeah if i wrote a sweet potato story where the main character just keeps suffering with no sign of resolution, i'd drop the story too (<- has actually done this with a tesilid fanfic orz)

"The world rejected the Strict Order's abandonment, so to keep the world going the Strict Order made Tesilid keep rewinding time." That's just like when you get stuck at a certain point in the plot and keep rewriting the events leading up to that moment to try to make it work. nods sagely i understand. i too make my OCs go through scenarios lots of times until we get it right. sometimes it takes months. sometimes it never works.

"The saintess only exists in timeline ~86," oh yes, the classic 'idk how to solve this problem so i'll introduce a new character' trick. i'm familiar

"okay but if time looping is the Strict Order rewriting the story, then why can Tesilid remember it" because the author already wrote those scenes and it'll be sad to throw them all out. and also it's a cool gimmick to have a regressor story. (<- has drastically changed the premise and worldbuilding of a story just to make an alternate timeline relevant before)

"what about ailette's existence--" same as muriel, where you insert a new character in hopes of solving a plot problem. except this time the characters write the plot themselves, because just this once you give priority to their character traits & goals rather than where you thought you wanted the plot to go. (tesilid has someone he can be himself around and who can do certain things on his behalf, instead of being fully constrained by his obligations. ailette gets insane buffs instead of being restricted by the world's difficulty.) therefore the chars now have more agency and are not only solving problems, but also taking the story in a direction you never would have thought of before. (whatever the hell tesilid and ailette are cooking rn, separately, which is surely going to result in interesting developments later on)

tldr; the strict order as a metaphor for an author who hit writer's block. their friend World Shaper inserts their OC Ailette in and their writing style is to let the characters run away with the plot. it works. world shaper and all their friends are co-writers working on the story together and reacting to it in real time.