I know this has been brought up before, but whne using a Wacom pen/tablet in Lightroom the pen pressure does not work as intended in Windows. From looking around online it seems that you can possibly get this to work (I have not been able to make it work) by ensuring Windows Ink is on and the box is checked in the Wacom settings. This has been stated by a few users to result in the pen pressure working correctly, however many then state that the sliders have considerable lag/stickiness after doing this (again not something I have experienced). Right now I have perfectly smooth sliders and no pen pressure sensitivity in Lightroom and nothing i have tried has changed this.
I did have issues with pen pressure in Photoshop and was able to resolve it by doing a simple text edit fix to force Photoshop to ignore windows ink. There does not appear to be a similar fix for Lightroom which is frustrating. I would very much like Adobe to address this and work with Wacom to improve this and allow full usage of the Wacom tablet and pen capabilities.
I have a Wacom Intuos Pro with the Pro Pen 2 - latest drivers.
Updates to the Adobe Photography Products were released Monday and contain several updates/enhancements for Wacom tablets. Please install the update via your Creative Cloud Desktop App or your respective App Store.
You may need to refresh the Creative Cloud App for desktop software to show an update.([Ctrl/Cmd]+[Alt/Opt]+ [ R ])