What you're suggesting Android vendors should copy in Apple is exactly what Xiaomi copied in Apple. They release on a yearly schedule like Apple, truly care about design, etc.
They'll never make Apple sized profits since they don't charge Apple sized prices, but no one will make anywhere near Apple sized profits in the Android market ever again. Samsung was an anomoly due to their massive marketing spending, but that's in the past now. Android is quickly becoming a purely commodity market, where even higher spec devices like Xiaomi's will be sold at low margin prices going forward.