I don't think you can be 11 games into the season only having kept 1 clean sheet (against a team who didn't try and score) and claim that the defence is in any way 'rejuvenated'.
We're not atrocious at the back by any means and I think we're unlucky not to have 3 or 4 clean sheets to our name but I don't think the numbers lie. Individually Matip, Clyne and Milner have started the season really well but how many excuses can you make before you say yeah, the defence isn't great?
We're a fucking boss team and we're going to give the league a real good go this season but our chances won't be helped by conceding silly goals like we do. We've came up short in the league twice in the past 7 or 8 years and each time we lamented silly defeats against silly teams. Hull away under Rodgers, Toure's pass against West Brom under Rodgers, stupid defeat against Middlesbrough under Rafa, etc. Silly goals and silly defeats seem OK in isolation because they are considered an anomaly, yet in a long season with plenty of good teams one silly defeat might just be the one silly defeat that costs you a title.
We won't score 5 every game. On occasion our attack will misfire and/or the opposition goalie will transform into Lev Yashin like we've seen a million times before. Our defence isn't in any way rejuvenated, it continues to concede silly goals like it did under Rodgers and even further back than that. If we can sort it out then we'll boost our chances of winning the league significantly.