I haven’t been using my Wacom Intuos Pen & Tablet with Adobe Lightroom for a while now since adjusting sliders and using the adjustment brush would lag and stutter a lot. I blamed it on Lightroom because well, it’s kinda slow!
But I found out that it’s actually a setting of the Wacom Intuous Pen & Tablet you have to make sure is unchecked. Make sure Use Windows-Ink is checked off as it’s the culprit of the unresponsive sliders in Lightroom.
I still find that drawing inside Lightroom is a tad bit slower than with a mouse but at least now the tablet is usable again for me!