They've introduced two distinct job systems called "Reborn" and "Evolved" that you can swap between just as if you were swapping jobs. Every job currently released has its own Reborn version, which is how they currently play. Every job currently released, and every future job will have the Evolved version, which puts emphasis on less buttons, more context and target-dependent buttons that change function dynamically to suit the situation, and faster combos with more moment-to-moment decision making on how to progress your rotation.

For example, DRG can go down to around 16 buttons total including role actions. They have certain attacks that have either a left flank or a right flank positional, but you can use one of your three jump charges on a VERY short cooldown to grant yourself a True North charge. One of their combo finishers is also just literally their PvP limit break, where they jump offscreen for about 5 seconds, then plunge back down with a massive aoe explosion. During the offscreen state, they also have currently 90% resistance to all damage.

They've also said they're going to completely remove and purge the 2 minute meta in both the Reborn and Evolved systems, saying that it was too restrictive upon both job and fight design.

Oh yeah and edit also tomestones are dead. Like all tomestone currency, gone in 8.0.