The performances against those teams seemed to have more to do with lack of team application than solely defensive deficiencies per se. However if you are going to single out individual matches then also consider those where we didn't concede, since that is as many as virtually every other team bar Chelsea.
Every single team, in every single match, has their 'hair-raising' defensive 'moments', that's the nature of football so if a player makes a mistake, yet it is then recovered by another defender / keeper, then that's an intake of breath .. but not something we should be castigating the defence for unless those deficiencies are perpetual .. and I don't see that they are, we have only conceded 9 more goals (even after some poor periods of team performances, especially early season) than the best defence in the league, and that's with injuries, lack of form (team & Lovren) and suspensions.
I agree with you on Can and on our WBs when we've played 3 at the back, but that is also experience since the formation is new to them this season and we've been using mostly very young players lacking experience as WBs (Moreno, Can, Markovic, Sterling, Ibe & Manquillo). I would expect improvement from them next season .. though I expect BR to revert to his favoured straight Back 4 in a 4-3-3 anyway. Injuries to Flanno and Johnson have enforced the use of that Back 3 and of the use of such young players.
I think many people are being a tad too harsh on our defence. The proof of the pudding is in the 'goals conceded' column.
