Consider this a testing period. I expected it to be very strong out of the box, so next patch will likely see some minor adjustments. I do want to see how it affects Dominion play though. It'll take some time to see its full effects.
Sweeper/Blackfire/Woogles has solved alot of the item issues casters have in one fell swoop. Nothing overpowered about that but every jax and his jayce will complain about it, they are not used to dying.