For sure, if you go down this route, and give Arteta the authority to freeze out and then free transfer their two biggest stars (Ozil & Auba), then it really doesn't make sense to suddenly do an about face and bin it all. It needs to be a medium-long term project, get the side evolving playing Arteta's way, developing the young players. What this means however is we need to be saying it doesn't matter what happens next season, Arteta will still be in a job for the following season, unless it's something totally catastrophic like serious threat of relegation. They will suffer growing pains, majority of the team have never played CL football, there will be heightened expectations whereby all the praise being heaped on the young players will start to morph into critisism when the going gets tough. Obviously Saka got some **** after the Euro final but the also got a massive amount of support - I don't want to downplay the importance of racism, but it's different to be given harsh measured criticism about your personal play from seasoned pundits, than just mindless trolling from some idiot on twitter.
So the point is, we can't have a knee-jerk next season, we need to be thinking 3 years ahead not 1 year ahead, otherwise there's no point giving Arteta the sort of the control he's brandished over the past 2 years.