Crafted Gear for leveling other classes is actually quite...amazing

[Raldo]

Is there any reason to upgrade to HERO over pentamelded rosegold?

For tanks: If you need every last bit of HP and mitigation stats for hard content, i90 accessories can be better. For faceroll content, you're generally better off with your i70 overmelds (or possibly even i90 STR accessories).

For Healers/DPS: If you don't need the additional HP granted from sticking VIT on your crafted accessories, then i90 accessories can be better. For faceroll content, you're generally better off with your i90 accessories.