PHOENIX — The Infiniti QX30 is yet the latest all-new vehicle to enter the heavily populated and growing entry-level compact luxury crossover utility vehicle segment, joining Audi Q3, BMW X1 and Mercedes-Benz GLA, to name a few. Infiniti is Nissan’s luxury brand and, for the most part, builds quite excellent vehicles. Stylistically, Infinitis have always had more visual appeal than competitors from Acura and Lexus. But I’ve never found them particularly thrilling to drive. More about that in a bit.