Usually some of them have "editing" hires -- a person or 2 whose job is to proof pages -- but they usually go home by 11 p.m. with many papers still having final deadlines of 90 minutes or more later. In theory, the claim is that the designers are copy editors (NOT), and the sad thing is some of the editing center coloring book people become newsroom editors (translation: work cheap). Go figure.
Have seen some where editor indicates a copy or headline change is needed... and it doesn't get changed and the designer who decided to ignore the editor faces nothing in the aftermath (even if the request was provided 3-4 hours off copy deadline).
Have also seen situations where the editing center dictates what will or will not go into the paper... and content decisions are made based on what the center says it can handle as far as copy. If an 8 p.m. in-state major college basketball game might mean missing deadline because the designer is SLOOOOOOOOOOOW.... said game won't see light of day. If the designer assigned is good, the game gets in.... so Southern Cal-UCLA gets in but Arizona-Arizona State may not the next night.
Best picture to describe the centers.... with music even provided for entertaintment... is front row seat at a CIRCUS, circus music, bunch of (you insert fav circus animal here) running around -- some of them tied to a pole, others allowed to run around like those at the zoo and show their a-- is red to the crowd.
They, editors who don't know a story when they see one and do see a story when it's only purpose is to please an old lady who grew a big tomato or for someone they like (conflict of interest) , and publishers who have disfigured lips (think about it, you'll get it) are destroying journalism as we know it.
That said, please pray for the profession.... used to be the almighty dollar didn't rule.
Nowadays there's really little difference -- quality-wise -- between the local cop reporter and the fast food grill master...'cept "Do you want fries with that?" is not something commonly in the vocabulary of a reporter until the last 10 years or so.