My guess is that Ian Kinsler will return to the leadoff spot once he comes off the disabled list, with Zack Cozart slotting back in the middle of the order. Cozart has undoubtedly been productive in Kinsler's stead, going 9-for-29 (.310) with two home runs in six games as the leadoff man, but I think Kinsler remains the Angels' preferred option at the spot due to his mix of on-base skills and savviness as a baserunner.
Not really. Manager Mike Scioscia didn't label anyone the official closer last year, either, though his preferences emerged as the season wore on.