Conte approach was not "cowardice football" he simply adapted himself to the players' characteristics, that are to score in counter attack or throught long ball to number 9
sarri is trying to build game, with possession football, but
1) he lacks two wingers able to go without the ball (like sterling and sane are for example). hazard is too in love with the ball, and willian or pedro or CHO are not so costant in their performances
2) he lacks two FB able to play both offensive and defensive phase (alonso able only in the offensive one, azpi only in the defensive one)
3) the midfield with RLC kante and jorginho is ok, but there are no adequate changes on the bench
4) he is obliged to play with david luiz as CB (with only chris on the bench)