The only solve for this was a completely fresh install on a new USB and new key (using the replace key option, retaining assignments as you suggested)
I did a BIOS update on the motherboard as well but still have pages worth of acpi errors that only began after the initial switch to 6.12.rc2.
Not sure if this should be marked solved as there was no actual fix found. I will leave that to a mod to decide.
I still need help getting rid of the errors though if anyone is up for that.
tower-diagnostics-20230429-1332.zip
LordShad0w's post in Sanity check was marked as the answer