Well... Why would a company introduce those features in a camera where 95% of people who buy it wouldn't understand what you're saying, rather than have you upgrade to the semi-pro model designed for people who do exposure bracketing, HDR, etc etc?
There is an exposure bracketing on the A200/300/350, too bad it's +/-0.7. There is a self timer on those as well, too bad there is no mirror lockup.
Why Sony put up those half-assed efforts is beyond me, probably they've been working with Nikon for too long?