Arteta easily the best rated manager in EPL right now, Klopp and Pep in a different class. Players like Saka absolutely motivated. Arsenal don't have it easy, but on the other hand, winning games against United and Spurs are their best bet for guaranteeing 4th spot (if not 3rd).
Arteta is comes from Pep tutorship right? Which means that even though Pep is a different class, Arteta had the chance to play in EPL for a long time, and then he had the chance to use that experience into building a better style with Pep for EPL and then used it for Arsenal. I mean he combined everything he got together and built something different. Dude is definitely one of the rare coaches for sure, but take him and put him on like let's say Lyon on Ligue 1 and I believe he would not be "this" great. He would still be a decent manager, but right now he is in the perfect position for his job and that is why he is overachieving so much.
He does come from Pep's staff, but I believe Arsenal part is a bit more true. Dude was an Arsenal player for like 5+ seasons I believe, and comes from Barcelona youth system himself as well. Combining those two together could be a bit more important than the Pep staff part. Don't get me wrong, he probably learned a lot there as well, definitely something beneficial for any manager in the world.
We have seen an example of this just recently Dominic Torrent was a staff member for Pep for years, started t o be manager for Galatasaray recently, and nearly took Barcelona to brink of elimination, so being in Pep's staff is a great deal for sure. But combining Barcelona youth + arsenal playing days for 5 seasons could lead to a great result too.