Add a quick selection brush to Lightroom like the one in Photoshop. That adjustment brush is just too hard to use. I can quick select much faster than I can brush (although brushes are still necessary in low contrast areas)
Maybe I just need better instruction on the use of auto mask, but I find that the brushed-on mask often extends past where I expect it to. Using delete to fix it does the same, so I find myself brushing deleting brushing deleting over and over until I finally get it right. With the Quick Select in PS I rarely have that problem.