Lightning overload now will go off 4 times as much as before, with half damage, I cant do the numbers, but that is a buff, it it were only 10% with half damage it would be a balance there(in a perfect rolling dice of 1 out of 10 chance of course). I wonder if the 20% will be 20% to proc off itself? if then we are gonna see some spamming bolts flying across the sky, at no additional threat at that for pve woot!
I also wonder if the overloads keep the rules if they proc off themselves too, say for easy numbers you throw a 1000 lightning bolt, your overload should be 500, if it procs again will the next overload be another 500 or a 250?