Yeah, everyone rightly talks about the rebuild Klopp did when you compare his first Liverpool team to his champions league winning team but i have to give Arteta massive credit for making Arsenal serious again. Look at his first line up as manager:
Leno
Maitland-Niles Sokratis Luiz Saka (at LB)
Xhaka Torreira
Ozil
Aubameyang, Lacazette, Nelson
It's not as bad as Klopp's first line up but it reminds me of some of our teams in the past few years: some star names but it's pretty crappy and flatters to deceive. The board did a great job in getting rid of them even though a few were controversial decisions.