I can work three to four times faster in AE. It isn't as cool and I miss the features of Motion, but my workload is like navigating a herd of stampeding buffalo – frantic from 7:30 a.m. to 5:30 p.m., with time for lunch only two to three times a week Stupifying, but real.
Apple tends to have a tunnel-visioned approach. With the overwhelming popularity of laptops Apple didn't see a need to continue its more vigorous support for multiple monitor rigs so instead of continuing something that would be appreciated by its serious pro users, it just lumps everyone into the basket. I remember how great iMovie used to be - it was enormously appealing. Even kids were using (and teachers, which is special because they are usually far too overwhelmed by the workload to spend time learning such an app). It was extremely intuitive. I used to demo the app for Apple when it first came out. Shoppers were blown away at how fast they could assemble a movie.
When Apple brought in the professional video guy to redesign it and they took the cool new cutting edge approach that filled the screen with an ocean of still frames, they killed off a vast number of users who were confused by all the visual clutter. Many people love the new version, but I would not put it in front of a teacher or an elementary school kid and ask them to guess how to use it.
Apple has always had an ivory tower approach and I've been using their products since 1989. Over the past 15 years (right up to today) I become nervous when upgrading anything from Apple because of what useful features might disappear.