Many people think that Unay Emery does not appreciate Mesut Ozil and his contribution at Arsenal, this is all because Emery has never played Ozil. Ozil has only played around twice and warmed up the bench even though his name rarely enters the player that Emery brought to compete.
Many suggest Ozil to go to get the expected minutes to play so he doesn't lose his touch. Because if he continues at Arsenal his career will end or even he will be forgotten as a world class player.
Paul Scholes even suggested Manchester United to recruit Ozil because MU really lacked a midfielder with high creativity, which was all in Ozil.