The 3-5-2 just isnt effective against some teams, at least with Pepe we have the option to play the 4-3-3 when we are struggling in a game, he will be played as a sub when we play 3-5-2, but Conte may change it up like last year and start some games with a 4-3-3 with the inclusion of Pepe, and I agree Chiello should not be played as lb in that situation, but both Isla and Caceres can handle themselves fine in that role