I recommend turning on the CA / PF removal tools by default, because they’re very intelligent at removing those image quality flaws, while causing zero damage to regular images.

Tools like these have really been opening up new avenues for both photographers, and lens makers.  Photographers can now breathe new life into say for example, shooting wide open on a “mediocre” f/1.8 prime lens that was previously plagued by terrible color fringing, (85mm f/1.8′s mostly) …or shooting horizon lines with consumer-grade ultra-wide lenses that previously warped a level horizon into a wobbly “mustache”.  Oppositely, this also allows lens engineers to consider different priorities when they design a lens in the first place.  If things like chromatic abberation and barrel / pincushion distortion are effortlessly fixed in programs like Lightroom, that frees them up to focus on more important things like sheer sharpness, and lens build quality in general.   Of course I’m not advocating that lens manufacturers start cutting corners and just expecting everyone to use advanced correction tools in post-production, however it is always nice to have options.

On Nikon cameras for example, these kinds of issues with aberrations & fringing have been corrected in-camera for years now.  It is nice to see companies like Adobe putting a similar effort into lens corrective tools.