Your point is invalid. Right now we concede like crazy, because we dont have Chiellini, not because we have 3 CBs, we had 3 CBs, up until now.
When you have CBs and one of them is Bonucci for ex, when/if he makes a mistake, you are 50% likely to concede. With 2 more experienced defenders around him, we have better chances and if the 2 wingbacks help the defence, the defensive front numbers 5 players rather than 4.
So this helps us and as i have already pointed the lack of tools we are having, particularly a LB than can defend properly. I have also pointed out and agree with the fact that we are forced to compromise if we play with players out of position, but unfortunately this is a reality we have to live with, not because of Conte's choices, but because of Marottas inability to gives us the right tools.
He has been searching for a LB since he joined us and the best he could do is Zeglier, Grosso and Peluso...
Conte should not be blamed that Marotta can bring a proper LB starter and stack ups CMs, on the contrary, he must be commended for using Asamoah that efficiently there, despite him not being made for that. It is a handicap Conte must face because of Marottas inefficiences.