In applying JDT's tactics better, we're much more open for teams to attack than last season. This further exposes our GK. Unfortunately I don't feel we've got that balance right between defending (we applied a block really effectively for large spells last season) and going for the throat of teams (where we often look good on the eye but waste quite a lot of good quality of chances).
I did say defensive unit, not individual players playing worse and making mistakes per se, although that's definitely part of it.