I bought Pure Raw 3 a few months before Adobe added their ML noise reduction to LR.
I would not buy it again. The new tool in LR is great.
LR states lens corrections, I still notice a bit of vignette at the wide end of my RF 24-70.
If I was annoyed by it I guess I could shoot a white wall, correct and save as default for that lens.
Distortion. Doesn't seem bad on my lens to notice if LR is doing anything. Again could shoot a brick wall, correct and save as default