Update.
finally solved it and decided to go easier although more expensive route.
Turns out all the microswitches worked OK. Again, every single one was just fine.
The problem was simply mechanical.
In both doors the latch worn to such extent that it would not trigger the switch.
The latch has a plastic cover/film. It is not a bare metal.
When it slides on the microswitch plate, at some point the plastic simply wears out. Or like in my case - on one side it completely cracked open and only some times would allow for contact, while the other side would not make the contact at all.
Manual trigger of the switch would make everything OK, though.
I looked for a way to maybe get the latch only or some other fixes... and then I though, heck, enough.
I just swapped the whole units with VW/Audi one, modified the plastic tab and it all works great.
One comment on the plastic tab.
Looking at the shape of it, the OEM tab is there to be able to open the door without the key or remote... you know what I mean
By modifying the tab on VW/Audi - this option is gone.
No more stealing my car
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