There is (imo) nothing wrong with the system at all. It was the system that CWAK was forced to adopt 3 years ago given the personnel we were left with at the time (pre/post-Millwall) and it has worked beautifully since.
The problem is it demands absolute commitment and discipline at all times and the ability to keep the ball in the more limited times we actually have ball possession. Unfortunately, some of our players have mentally decided that they aren't going to commit to it like they did last season in the Prem. They aren't prepared to work as hard on or off the ball (our pressing this season has been awful) and, as a result, this has had a knock-on effect of damaging the confidence of the squad, meaning that our passing and movement have gone to shit.
I do agree that a change is warranted. Not because 'other teams have sussed us out', but because CWAK need to completely reset the mentality of the squad and a complete change of approach might be the last throw of the dice.
I also think it's pretty obvious that one or two have 'gone off the boil' since signing new, improved contracts which also, hasn't helped. The system (imo) isn't to blame and it's too easy to look at that as an excuse. The players have to take some blame, as does the management at times.
UTB