I'm curious to know the process on the ECOs side.
It's not just about traffic offenses. If your application burped at one of the system interfaces, like biometrics for example, then BAM there's a delay until a human can sort it out. Interfaces to other systems can fail over things as trivial as having an apostrophe in one of the text fields.
You also applied over a bank holiday, and it's the spousal season to boot.
About the ECO: The ECO doesn't spend that much time on an application, as soon as proviso says all the stuff is ready he looks at it straight-away. He spends a preset amount of time mulling it over and if he cannot reach a decision within that time, the app is referred.
They are not supposed to spend lots of time mulling things over because it slows the work flow down.