I find this game is lacking a proper 'hard impact' effect.
Something that resonates a loud 'BOOM' accompanied by a wave of dust/dirt, some cracking in the ground, and possibly a screen shake.
Would be perfect for executions that end with a slam, such as the shugs smash or the warlords elbow
https://media.giphy.com/media/EOfarA6ZUqzZu/giphy.gif
Apologies I dont know how to post gifs properly *shrug*