I love the wave launcher, no need to leave the app to jump to my most common apps, one step simple swipe. let's say I want to open facebook, reader, and Done! all at once.
Wave launcher method:
swipe up till i am on facebook, let go
swipe up till i am on reader, let go
swipe up till i am on Done!, let go
Quick launch method:
swipe up, let go, tap facebook icon
swipe up, let go, tap reader icon
swipe up, let go, tap Done! icon
that is three extra steps, less smooth.
Probably not a huge deal but I am accustomed to the wave launcher and I really like how it keeps thing simple