The thing is, I didn’t like tier but lately do miss it. Having to grind for it was terrible, but tier swapped when you spec swapped. You still have to keep piles of gear for other specs, the stats don’t magically swap (secondaries). Whereas you have to keep multiple sets of Azerite, you didn’t have to with the tier, because the modifiers swapped again to that other spec.
I really, really hated being locked down by tier and unable to swap pieces because of it, but I will admit liking it better than the current system.