Writer/director M. Night Shyamalan recently restored his fledgling filmmaking career to an upright position. After a solid decade of critical and commercial failures, “The Sixth Sense” helmer shed budgetary needs and chased a trend for 2015’s “The Visit,” a tepid found footage endeavor that unexpectedly found an audience hungry for cheap thrills, giving Shyamalan a second wind as a conductor of low-budget genre shenanigans. “Split” is his latest effort, and while more traditional in execution, the feature remains fixated on exploitation pursuits, working to find nail-biting manipulations with a screenplay that’s rooted in real-world agony. Shyamalan knows a thing or two about suspense, but he has questionable awareness of good taste, keeping “Split” more of a bummer than a barnstormer. Read the rest at Blu-ray.com