I finally watched the first episode of MagiReco and I personally thought the filler they added was pretty boring.
I (who read a few chapters before) watched it with my gf (who didn't read it before) and we both did agree that the first ep was pretty slow. I don't think it's necessarily filler, but it wasn't very interesting material since we were just waiting for something to happen.
But I also understood why they put the "beginning" of the story at the end of episode 1 because if they went into the talk with the king and stuff after, it'd feel like a very very weird episode 1 so I don't blame how they structured ep 1. They needed something to hook viewers to watch more than 1 episode so that is the hook.
Even though ep 1 is boring, I can see more people sticking it out and then getting intrigued to continue onto episode 2 vs if they watched an info dumpy episode 1 that ends with Euphie moving in with Anis. And yeah my gf did want to watch another episode after watching so it worked lol. (I also showed her some of the manga chapters that took place after ep 1 since she was curious and she agreed it'd be weird for that to be in ep 1)