Looking for a way to track changes made that aren't shown in NetSuites default logs. e.g. Someone changes the Reorder Point on an Item Record Is there a way to easily identify WHICH fields/sublist fields were changed using oldRecord/newRecord? or would I need to list out each sublist, and field and get their values / compare it to the oldRecord... etc. to determine which fields had changed?

Fairly certain the latter, not an easy native way to do it.

Or maybe the approach is to have a client side script catch all fieldChanged events and log the details of the field/sublist names, store that somewhere and then use an afterSubmit script to compare the oldRecord and newRecord for just the fields/sublists that were captured in fieldChanged events?

That will only catch UI changes but is an option, I would imagine changing things in bulk/csv is more common. Depends on your account I suppose

Good point on that only catching UI changes, but I think it would be sufficient for our account... or at least as a band-aid option while I figure out a better solution