We still could do with GPU and NIC usage graphs for the settings screen alongside the CPU and MEM usage. It currently just shows as no real usage so no idea what is going on under the hood without using Windows Resource Monitor.
Ideally it would be nice for it to show Disk performance too so bottlenecks can be seen inside of plex rather than having to use external apps
There are already some existing suggestions addressing most of what you describe.
GPU usage
Drive usage / DiskIO
More, e.g. CPU temperature
Plex should already show network usage – though that’s only focusing on Plex’ own traffic/streaming.
I suggest you vote/comment in those existing threads.
If you feel the need to keep the NIC usage, let’s focus this suggestion on that particular feature.
most topics have been closed and yet still no improvements. If there is GPU transcoding available then its more relevant to have GPU graph than CPU as CPU will mostly be idle for the purposes of Plex