I say good riddance to a bad influence! In fact, I had long advocated to get rid of the player whose heart had long not been with Arsenal.
You don't want to keep a player whose heart is somewhere else except the team he plays for. That is a sure disruptive thing to any team.
And Arsenal suffered enough from that. No manager should kau tow to any player no matter how good he is.
Now that Sanchez has signed for United, Arsenal can go on without having to put up with his nonsense.
Indeed with Sanchez out, Arsenal returned to playing with the kind of flair that fans expect of and have come to associate with the team when they tore Crystal Palace apart 4-1 without the petulant player's disruptive antics to hamper the flow of affairs.
The last decent thing Sanchez should do is not to badmouth the team he had left.
Everyone has his own idea why Sanchez left. Arsene himself has alluded to it.
Smart fans are not bitter nor bothered with why Sanchez left. That is his own calling and he has every right to do what he wants to do.