Without needing to regurgitate all the negative issues and incidents that have entwined themselves in AMN career so far, which culminated in his social media plea at the start of the season that at the time appeared to be signalling the end of his tenure at arsenal, I would go so far as to suggest a watershed moment for Arteta's managerial career regards the aspect of developing his man management skills and greater appreciation of dealing with personalities that may lack discipline, responsibility and professionalism.
In imagining that the subsequent 'cards on the table' meeting that followed was as simple, honest and mature as a young manager admitting to a young player that he's made errors of judgement and vice versa, the young Englishman now finds himself being cemented into the squad with good minutes of playing time and primed to replace Elneny as back-up central midfielder and probably also Cedric, Chambers and Bellerin as the go-to player for right back in the event of Tommy being unavailable.
With the now visible level of improvement to Saliba's all round game justifying the manager's concerns of him likely to be vulnerable to the rigors of Premier League football proving more than tangible and appearing to now be appreciated by the young Frenchman and growing his determination and enthusiasm to play a leading role within the squad from next season.
In recognition that Arteta has indeed made some man management mistakes during his tenure, that he has shown the character to both recognise and seek to rectify those errors now work to showcase Guendouzi as being a 6'2" dildo that happens to be good at playing football also.