Easy to point to Busquets and Alba, but the issue tonight were the younger guys being clueless positionally for me - especially the CBs. Araujo and Garcia looked their age. Hopefully Christensen can bring in experience.
Pedri and Gavi didn't look solid either, but that's another story.
Removing Busquets and Alba isn't
the solution, but signing their replacements is a good start, and for that you have to sign well and replace them with proper quality. But I do believe that it is going to be very tough to compete at the highest level with Busquets who need the perfect setup to be impactful without being a liability, Alba who seem to lose his composure very quickly in games like these and ter Stegen who is about to turn 30 years old but plays like he is approaching 40.
As for the CB pairing then I do agree with you. We ideally need a leader in there. I did bring up Koulibaly a couple of months ago. Yeah he turns 30 soon, but he has one year left on his contract, if you can get him for a reasonable price he would fill in the void of a leader in there while also having the required quickness and athleticism that would pair very well with Araujo. Alternatively you could go for Kounde if you believe he is an elite player in the making.
I don't think Eric is ever going to be starting quality for us and even if Christensen could be the ideal starter alongside Araujo we need to start bringing in more quality in the squad and let players compete against each other for their spots.
We do need to fill in quality at multiple positions to be fair and it's not going to be done in one transfer window.
We need a replacement at GK, we need proper competition at LB, we need quality competition at RB, we need a replacement at CDM, we need a starter at CF and likely a starter at RW too.
Not all signings have to be for the 70/80m kind, but we need to bring in proper quality instead of trying to get cheap depth that will amount to nothing.