Great stuff!
Here are a few more fun tweaks to use with the heavy ball / suspended lunge
1) Tap it too the ground as far in front of you as you can at the bottom of each rep - this will create an even stronger hamstring and glute contraction
2) Hold the ball high overhead throughout the set - big emphasis on shoulders and will light the quads on fire
3) Holding the ball overhead, side bend into the ground leg as you drop into the lunge - this will fire the lateral part of the core big time
4) Slam the ball into the floor as hard as possible right after from the explosive jump. The cadence of the movement sounds like this Lunge - Jump - Land - Slam & Catch and then repeat. If you have a partner or a concrete wall beside you it allows you to use the same principle but use a rotational 2- handed side throw
Have fun