The American Government cancelled an order for aircraft due to the quality of workmanship , tools and swarf from drilling left inside the wings .The inconel/kevlar/tungsten carbide (combinations thereof, or delete as applicable) cover shroud is designed to do precisely that - blade failure containment. Have a browse on Pratt and Whitney's own website.
A lot of Boeing production was moved from Seattle to North Carolina (or South, I forget which) and concerns about lesser quality from that plant are well documented in the public domain - poorly fitted fasteners, incorrectly routed cabling, lots of little things adding up to a big bucket of creaks and rattles. Not enough to fail certification, but enough that these aircraft are difficult to sell once they're 5 or more years old. Be interesting to see where this one was constructed.