Clrnc I'd also add that I think from everything we've heard this season about Xhaka's role in the team plus the fact he's now moving on with rumours of two very different players incoming, that Arteta has always been very aware of his limitations and it was always a case of not if but when.
Glad he's rebuilt a relationship with the fans (which truly is to his credit) and worked hard to find a role that has made him useful but also happy that we're finally upgrading.