I don't understand the 'change the system' crowd - and I say this as someone who disliked (and still dislikes) systems based on three central defenders long before Juve Juve started playing that way.
Juve aren't playing well when in possession just now, but they are still scoring enough goals to win games.
The real issue is Juve's determination to make stupid mistakes to ensure the opposition scores every single time they make it into Juve's half, and I don't see how a system change is going to improve that side of things.
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I couldn't recall one game this season where we got outplayed by an opponent. In the games we drew, it were a mix of wasted chances due to poor finishing and brilliant goal keeping and major defending fuck ups by even veterans like Chiellini and Buffon.
I blame Conte for failing to solve that loss of concentration up until now. But, I believe he will, soon.
I'm not sure how much blame you can put on Conte - at least when looking from the outside and not really knowing what's going on.
I look to professional players - especially ones as experienced as Buffon and Chiellini - to not need instructions such as 'concentrate' or 'avoid any defensive calamities today, lads'...
However, there is something up with a lot of the squad, so Conte certainly can't be entirely devoid of blame.