The easing part that occurs before it's tossed away has to occur along the same fixed line.
The first animation eases out to the bottom left, then tosses away to the upper right. Notice that at all parts of the animation it occurs along the same straight line.
The second animation eases out to the left, then tosses away to the right. It's another dead-straight line.
As long the toss animation occurs along only the one straight line, the easing at the start and the speed of the toss can be customised with ease.
If you want the animation to occur along anything else than a dead-straight line, you cannot use the toss transition. Instead, a special custom transition would need to be commissioned that meets the desired requirements.