Improving on DII LoD’s crafting system is definitely the way to go. Allowing players to target a specific kind of item where maybe 1-2 suffixes are set and the others are generated. A lot of them. Cube recipes shouldn’t drop like artisan recipes did in “Diablo” 3. Cube recipes could be found in lore books / scrolls or whatever but shouldn’t be necessary to do the craft.
Anything is most likely better than what Blizzard has in mind 
They way you phrased that makes it sound like you think it’s actually good which it’s not. It’s not Diablo.
“Legendaries” are “Uniques” in Diablo btw, what the devs call them is irrelevant.