Shake was acquired and then killed.
FCP is no longer a pro application. They've added lots of nice first time user experience things, but largely ignored what "professional" users need. Which is fine. Apple wants to sell software (and iphones and ipads) to Moms and Dads and college kids.
FCP may not be a pro application for editors who use tape, but it is most definitely a pro app for editors who have gone fully digital. I doubt Apple spent millions of dollars and several years to rebuild FCP from the ground up in order to sell iPhones to Moms and Dads.