It’s amazing to see a musician shoot outta the gate fully-formed, at full strength. But there’s something more edifying, in light of the lives most of us live, to watch an artist hit stride steadily, building a greatness over years. Long-game players. Kevin Morby is one of those. Precocious? Sure—drops out of a Midwest high school, hits Brooklyn as indie crests, joins a rangy band with DIY ambitions ( Woods ) before he’s of legal drinking age, forms his own band with a talented co-conspirator ( the Babies , with Vivian Girls ’ Cassie Ramone), then goes solo, accruing catalog and keepers over a decade-plus, averaging about an LP a year. Midwestern work ethic, for sure. No score yet, be the first to add. Little Wide Open is the most cohesive, tuneful and cleanly drawn album of Morby’s career. It’s rooted in his history, particularly his knack for collaboration, though its sharp focus feels new and a little startling. Maybe it’s looming fatherhood ; maybe it’s Morby’s comfort with shifting ambition.…