Ohmwrecker active should reassign tower aggro on enemy champion cast.

An idea for Ohmwrecker that I have been sitting on for a while now. In its current state, it has yet to be desired stats, and a powerful active. My issue is that the active isnt worth what you get for it in stats, the active while great for diving, loses effectiveness in the late game due to tanks being able to take the inhibitor turret lasers like its a nice massage. Even when you are ahead,its a bad purchase because you usually have the tankiness to survive a dive, and gold could be spent on more useful utility. IE; Locket, FoTM, Randuins, Mikaels etc.

My thoughts were that the item allows teams that are behind to still be able to have a presence under their tower instead of nearly always being forced off it by a far stronger front line, and means that the backline aren't always safe like they are now. Vayne diving your team? Make her take aggro instead of the 220 armor jungler, CC, collect 300g. Ohmrekt.

This allows it to be used as a good item when behind, instead of being a strictly offensive only item and sucking because of it, and also has very easy counterplay. Walk out of range.

Thoughts?