Old Tier sets are about as hit and miss as current legendaries. When you say "bring back tier sets and classes will be better" a significant amount of set bonuses looked like thispic.twitter.com/JEfajszZ9F
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It also made them tune the classes more aggressively. The “Friday heroic week tuning” doesn’t even happen anymore because the classes are so similar raid to raid. When some sets where a 15% increase and some 3% they balanced accordingly now they actually afk.
I think that's completely based on what role you played. Calli mentioned tanks getting little out of their bonuses historically and this is true for healers. I could be wrong about tier sets and maybe the real issue is designers don't make fun bonuses for all 36 specs
adding onto this, its also a good way to test potential class changes. Ret did not get holy power from judgement for quite a while until a tier set had it, the spec was just better for it, and it became a staple of ret. Many ret players likely cant imagine it being different.
I don't think tier is necessary for this. Glimmer came from azerite for example
Also cool times when you could mix sets
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