One reason that they might have moved them to the separate “Detection Settings” page is that some** of the settings there are also used for event-triggered recording to the SD card. I recall that there was a lot of confusion on this issue with the previous GUI. People who had SD cards and had configured recording to be event-triggered frequently missed the fact that local recording uses the same settings as for event recording to the cloud. By moving the settings to a separate page, it’s a little more obvious (very little) that the settings impact both cloud recording and local SD card recording.
The Detection Settings also influence Automations, per the guide text at the top of the page. From a UX perspective, it would be helpful if that guide text mentioned that the Motion detection settings influence local recording to micro SD card.
**To be clear, only some of them are relevant for local recording. The sound sensitivity is immaterial. However, the detection zone is common for both local and cloud, based on my experience.