I personally just lost faith with what they did to Summoner. I'm going on ahead and make a prediction the 4th caster will have similar mobility than Summoner because a lot of people just enjoy the new Summoner when it isn't a real caster anymore.

They ruined the caster playstyle of Summoner
They butchered the identity of Samurai
They keep buffing melees (buffing Reaper being behind other melees when they buffed melees who were behind Reaper earlier)
They keep failing to understand why people are upset about Machinist

You can clear with any comp but in theory, let's be real, you'll never see double ranged physical in a raid comp. The flex spot is autoed to a second melee or Black Mage.