The most and only reason why i think it will not be nerfed is because of the nature of the spell and also the reason behind all the QQ about being too OP.
That is : the skill does not scale at all. its just a flat out intel gain. so while it seems alot in normal and even nightmare, it will definitely not be OP in the harder stages.
yes, i understand that intelligence gives a flat out 1% per point increase and that scales. BUT, lets not forget the fact that while that is happening, You'll find demon hunters with perhaps 10000 dexterity items in hell or what not. In this case, you will find that having an extra 150? intelligence is nothing.