"With sets and cosmetic appearances we're always trying new things. We're currently not planning on carrying forward traditional raid class sets," says Hazzikostas. So we're going to have artwise, the gear will be more heavily themed from the place it comes. There's more customization we want to express through the new Azerite system. I think class sets have changed a lot over a years of World of Warcraft. Back in the day, these 8 piece sets you would put together over the course of 6 to 8 months raiding a zone, where now the smaller sets and so many more sources of gear, it's very common to get 2 or 4 pieces at the start of a tier and it actually kind of locks down those character slots, it limits your choices. It feels like more of a drawback than a strength at this point."
Q: Are there any plans to reduce viability of old tier sets? Having 6 slots locked into tier feels bad.
A: They've reduced some T19 bonuses, but it's likely that many players will just use 4pc T21 and 2pc T20 and they don't like it. They opened tier to 6 slots to have more freedom for Legendaries, but that means that 4pc + 2pc has happened and they're taking it into consideration for the future.