Thanks a lot for sharing your thoughts and ideas.
Even though I have a "SuperPinda" supposed to be immune to temperature changes, I still noticed that the measuring distance is different in various temperatures (not a lot, but still enough to mess up the first layer).
I adopted your configuration and find it pretty usefull.
So bottom line, my Z1 probe is the nozzle sensor used to determine the distance between nozzle and bed - great strategy as even a nozzle swap automatically adjusts the right height between nozzle and bed. Something to bare in mind for other users, you shall have a waste bin with steel brush to clean the nozzle from debries prior final z-adjustment (after heating the nozzle). If not present, there is the risk, that oozed out filament messes up with the testing (as the nozzle appears "longer" to the printer).
The Z0 probe is the PINDA (inductive sensor), which is only used for gantry leveling and mesh bed compensation. Trigger distances may vary between temperatures, but as only relative values to each other are used as reference, this does not really matter. (aka it does not make a difference if the 4 trigger points are measured at 1.5 or 1.7 mm).
So thanks for your support and insights.