Thats because one of those 'CBs' was a midfielder who pushed into midfield in possession and/or we were strong through the middle, we are nothing of the sort now.2016/2017 we were killing it with 343. I dunno why peeps have this fixed mentality that 3 at the back = doom for us... Let's also not forget that we made the switch when we did because we were creating fuck all in a 4231 at the time. Evidently the situation is a bit more complex than 4231 or bust (we used to hear the same thing about 442 if you go back far enough).
I agree about "will without tactics", but tactics are what you play within a given formation; they're not implicitly dictated by said chosen formation.
Like others have said, starting FIVE central players at home against Watford is pathetic.