"In rewriting these [OS X] applications, some features from iWork '09 were not available for the initial release," Apple said in a support document. "We plan to reintroduce some of these features in the next few releases and will continue to add brand new features on an ongoing basis."
Apple is believed to have dropped the features in the OS X version of the apps to make them more compatible with the iOS versions.
Apple said it plans to restore 18 features in all to Pages (8), Numbers (6) and Keynote (4) on the Mac in the next six months. Among them are customizable toolbars, renewed support for AppleScript workflow automation and page- and section-management via thumbnails.