Got 3 wins last night. Looking forward to getting back into the game tonight when hopefully they won't close the servers for 2 hours.
The Dive move is the fastest way to move and gives you the most airtime. So for example it's great for the obstacle course with the windmills, as well as the course with the walls that move up and down. You can just squeeze over a wall that would have blocked you otherwise.
Recommend Jump Diving through the last set of doors in Door Dash. Can make the difference between being out and being in the Top 20%.
Its best use is in Hex-a-gon. You can use it to get to hexagons that would otherwise be out of reach. You can really clutch a win that way, as long as you jump straight away after.
Egg Scramble just sucks. It's so hard to get out of the nest.
And as @TokyoSlim says, you can also use it as a Double Jump and a Stretch for the finish line. It's gotten me through a couple of times on Tip-toe.