So the Mundo Cleaver-hit noise should NOT be changed, imo. The preview Q seems to have a much higher pitched hit noise, but the current sound is one of the most iconic and satisfying aspects of mundo's kit. Please don't change it. I like the rest of the Q changes except the impact sound.
hey hey! Sound designer here (sorry for being late). Thanks for the comments - I did end up changing the SFX based off some feedback. It's in the second video on the original link to this!