Adobe introduced a new lens profile for the new Sony 12-24 G lens few days ago.
I believe that the profile heavily over-compensates for falloff in the lens, and thus, has rendered the profile useless.
I think (speculating) that the profile was built with the in-camera RAW profile turned off, and that profile already compensates for a ceratin amount of falloff, and therefore we are getting double adjustment. Since the RAW profile from Sony is written to the file (and isn't an adjustment profile like these are), the LR profile should have been built with it turned on, not off.
I'd like to hear if anyone else has noticed this, and if there is an intent to correct this.
If you're not happy with the profile believe that it's not functioning correctly then it's probably best that you arise the matter on the Lightroom feedback forum. That way the engineers and QE folk are more likely to read about your concerns. The forum is accessed at Photoshop Lightroom | Photoshop Family Customer Community