My knees should be more bent, I am a poor example in that regard.
As far as committing early from a traverse, you don’t need so much speed but you do need commitment. Especially going from toeside to heelside, you have to be willing to huck it blind and that takes some faith in your edge.
ETA: look at this video, especially around the 5:33 mark where Corey talks about early pressure and carving the downhill edge. Watch him demo, he’s not going fast and he’s on an easy blue. (Aside: was this really 10 years ago? Yikes!)