David Pierce is editor-at-large and Vergecast co-host with over a decade of experience covering consumer tech. Previously, at Protocol, The Wall Street Journal, and Wired.The iPad Air is a tricky tablet. At times, it has been the most compelling of Apple’s lineup, the Goldilocks-perfect combination of features and price. Other times, it starts to feel like an awkwardly placed option, both too expensive and not good enough. With the new model, which Apple just announced via a press release, Apple...