After looking around at numerous staff in the editor, a lot of the attributes and other details are vanilla. I would guess that most of our issues might be data issues. I haven't done a deep dive, but whenever I check out a random manager, their directness is low (which could be influencing the high pass % and the team's willingness to pass it in the back).
Many details available to align the staff with their real-life counterparts are not utilized, especially for board members. For example, many of the tendencies available would probably make hiring managers better if they were used.
One noticeable thing is that many managers have a low attribute for rotating players, and I also noticed an inconsistency, which may or may not be a problem. A manager would have "will use sub" as a tendency with an attribute, but when you look at the tab that lists all attributes, "Use of subs" is always 0.
Also, "versatility" is always 0 for most managers outside the most known guys, and even their attribute is low. I don't know what it does, but that brings up another point: is there a source that defines all of these options inside the editor? Maybe it is tied to the manager's starting games with their other formations, IDK.