I don't think any Chelsea fan is 100% satisfied with our defense - I think that anyone who watches us week-in week-out would understand that addressing our finishing in the final third and upgrading our goalkeeper are far and away the best ways to improve the squad. None of our defenders are world class, but axing them would leave us in a terrible position in terms of recruiting a replacement and on top of that I'm not convinced our CBs can't do a job in front of a decent keeper.There's so much talk of xG and the likes in this thread and for me the point is that its dangerous and misleading to be seeking too much comfort from that.
You didn't lose 12 and concede 54 simply because Kepa was throwing them in. There's been a real imbalance in the team IMO, a little naivety about game management, and signing a new keeper won't change that. It might help to paper over the cracks, but no more than that.
I think Lampards had a decent season but i would have.....maybe not serious concerns, but there is definitely a question mark about his ability to find that balance, because you can sign all the attacking talent you want but when they have an off day (and they will) you'll lose the game.
Does it mean that Chelsea won't be dangerous next season? No. I reckon it will stop Chelsea from kicking on to challenge the elite though unless Lampard can address this, and maybe he will and this post will look stupid in a years time.
And yes, it's not as though Kepa was chucking them in literally, but it is undeniable that our defence was far more on edge when he played - see our most recent performance against Wolves with a 38 year old Caballero in net. The level of assuredness was night and day.
I think the point you bring up about finding the balance is fair - at times we've been prone to push on more than would be advisable (especially our fullbacks) and this has led to issues on the counter. That said, I don't know the extent to which I'd blame Lampard for this - personally I'd rather go for the 3 points and push our players on instead of settling for a single point.