I have the sinking feeling the new essence reaver is going to be like devourer all over again. I love the diversity it brought to build paths, but riot had a lot of trouble balancing it.
The same with the new essence reaver. New build paths will open up and I'm sure essence reaver users will have lots of fun spamming spells, but it won't be fun for the mage they are beating down.
i suggest mages get a new item that would help to counter low cooldown spell spamming. Something that is just as fun and creative as the new essence reaver.
And spell bound orb just isn't cutting it.