Martin, I never used z-Offset for PLA on 500+ prints before (unless I printed on 3rd party flat print bed with carbon fiber pattern) but I changed nozzle now and need to use z-offset of 0.02 even for standard PLA. On other side I needed to use some z-offset for PETG but not for ASA/ABS.
I did not investigate too much in firmware to see if this can be adjusted somewhere else and using anyhow my own printer profile with this macro adoption to automatically change z-offset based on filament or print plate.