Over in the Leica Forums, a lot of users are complaining that either Leica or Adobe has changed some of the defaults when images are imported into Lightroom. Now ‘Enable Profile Corrections’ is switched on by default.
It seems may people are not familiar with changing Lightroom defaults.
Its very simple but it is camera specific. So import an image for the camera you want to set the defaults for. Select the image and go into the develop module, click reset to take it back to the original defaults, then hold down the option key and the reset button becomes a ‘Set Default’.
If you wish you can also make the settings camera specific, and also ISO specific. If you shoot certain fixed ISO’s like base 100 ISO and 1600/3200 for dark scenes, then this can be useful. This is buried in the preferences.