You need to give it a whirl anyway. You can't avoid plagiarizing in this genre, mobas have been too fleshed out already. This is the best of the genre, imo, and game of the year for me.
I was kind of interested in Smite, was keen to see what it could do. But after this trailer, I'm a little put off, considering this is pretty much a complete rip off of League of Legends' "Shaco the Demon Jester". Identical passive, almost identical first ability, similar 2nd ability to Shaco's ultimate, ultimate that takes part of Shaco's first ability again. Not sure if there is a reasonable explanation for the apparent copy, but from what I can see, this is taking the piss a bit.