I watched the Arsenal game and what struck me was how little purpose there was about Arsenal compared to what I usually associate with an Arsenal team...
There was no tactical movement like overlaps. No overloads. No clever interplay around the box. Just 11 players passing it around like they were playing in the park. Incredibly stale and bereft of tactical direction.
Rather than relying on anything they've been drilled to do on the training ground, the team is utterly reliant on individual brilliance from one or two players, and that is a recipe for disaster when those players leave.
You used to look at Arsenal teams a few years ago and there would be a recognizable style of play, and in games like this it was wave after wave of attack, whereas here it was just aimless knocking about, and hardly any chances created for vast stretches of the game.
Needless to say, this is undoubtedly a huge summer for the club, and if they make some poor decisions it could really set them back quite a few years, and one season out of the CL can quickly turn into two, and three,... and with Spurs moving into a new stadium and Chelsea being well run the "London factor" wouldn't be as great as it has been.