A quick thought on graves; snowballs too easily
I don't really find graves op unless he gets that early kill, which is quite easy for him tbh so it happens frequently.
Shortly after he gets that first 1-2 kills, it turns into 3-4, then 5-6 and beyond until it's gg.
I don't have the perfect solution, but I really think his early power needs a slight trade for later power.