Origin and Class Bonuses are overshadowing the Champions abilities.
After playing TFT for a couple hou- Okay so 6 hours, I'm come to the conclusion that the set bonuses offered by the game are way overtuned, and de-emphasizes making a team of powerful, unique champions and instead boiling them down to their Origin and Class traits.
Perhaps it's even just the 6-set bonuses, but I can tell you this. I never once chose rengar because I needed an execute (I didn't even KNOW he had an execute until reading the guide), I chose him because he was the easiest unit with "Wild" to get with my Ahri, Nidalee and Warwick and rank 1 Gnar aint cutting it.