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should I still keep nvidia_drm.modeset=1 in the kernel options
Yes.
It'll keep the simpledrm device away and expose the EDIDs to /sys/class/drm - it's also required if you ever wanna dabble in wayland.
The journal is not supposed to contain sensitive information (at best embarassing if you chose silly host/usernames - and nobody cares)
The disk UUIDs are for collision prevention and your system yells it's NIC MACs into the immediate environment - which is also the only area where this could be of interest.
One possibly pitfall is that sudo gets audited and logged and the call itself *might* contain sensitive data.
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