This is a nuisance. A small one, granted... but sometimes it's the little things in life. Which is why, I admit, Comfort Access was a big reason I bought the Premium Package. I'm used to having automatic unlock/lock and knew I would miss it.
But the setup in the 3-series is lacking. You should be able to touch the rear doors (ok, it would cost more to implement -- I'll give 'em that) to open them. At least add the ability to touch the driver's door twice to unlock all the doors. And I can't get used to the unlock being in the middle of the car instead of on the driver's armrest.