This is expected behavior. Only the unedited original versions of photos will import from an iOS device to your Mac through iPhoto, Aperture, or Image Capture.
As an alternative, you can share edited images via email from Photos on your iOS device. After you tap Send, you can choose the size of the edited photos. Choose Actual Size to send full-sized images with all edits applied.
You can also use Photos for OS X and iCloud Photo Library to keep photos, including their edits, up-to-date across devices.