I’m proposing to shift the whole concept of legendary powers that make builds which spawned in D3 due to the lack of investion in skills/talents, to the talent tree.
This way uniques/legendaries could remain a rare event to see one of them dropping and focusing solely on affixes and properties on gear but not defining a build completely. This way also the gear slots are more flexible, we would be chasing a collecion of affixes more than specific gear.
Read more here: [D4] The problem with legendary powers (and solution)