I have to agree with several comments Andrew made earlier:
*GPU acceleration is a joke. For me it simply slows down virtually any process I do in LR, whether panning an image or moving a slider
*Lightroom Mobile is convoluted and not practical for any large job.
One area I will give kudos is demosaicizing some of the cameras. I spent a number of hours working with four other converters and LR doing several different difficult images - a heavily side lit photo (of my kids, since I always exert better control over my commercial shots) and a contrasty fall scenic. I was especially interested in how the different programs handled the scenic, since it was from my Canon 5Ds. I used: Capture One, DxO, Canon DPP, and Photo Ninja. I hated Capture One. DxO was slightly better. DPP was the hardest to get what I wanted. Photo Ninja had the best, by far, conversion of the scene. But hands down, Lightroom, after much massaging to almost match Photo Ninja, had by far the most detail massaged from the 5Ds. At first I thought Photo Ninja was the winner (certainly looked that way when viewed at 25 and 50%). But pixel peeping at 100 and 200%, Lightroom showed much better detail, especially in the shadows and darker midtones. If I have a chance later, I might upload some screen shots. However, not likely to be soon since I'm headed off on a shoot on Saturday.
So Lightroom does do some things better than the competition. Too bad it's a turd in some other areas, such as crashing my computer. (Not too bad today. Only took it down once today.)