I think the melee speed needs some balancing. Instead of raw numbers, it should just be a small percentage boost. (0.1% per level) Or else you get such a ridiculous amount. Yoyos only bug out on excessive melee speeds. And I mean EXCESSIVE. The likes that make beam-swords the most powerful items in the game. I think pegduin made a video about this. I really need to get down and play this mod to give more suggestions.