Taking inspiration from other games such as breath of the wild, here is two suggestions:

1. When you are above two or three blocks high, let there be a jumping attack animation.

2. Add in goblin camps to the game, with goblins of course. This is to spice up the animations of pre-existing mobs that aren't as friendly as they can be with regards to animations.

Goblin camps can be an entirely different mod (more cursepoints kekw)