Having to rely on the Center to call the protections and blocking schemes and then losing said Center is also a crippling blow. I fully understand not every QB is Brees, Brady, or Manning, but for the amount of cap even tier 3 QBs are now consuming, it feels insulting when a QB getting an AAV of $37.5m a year can't handle those calls.
Not only losing the center, but the guy behind him. We had to go find a center who wasn't on a roster. The line has been an absolute mess this season. They were better yesterday, but it's the Panthers.