You do know that that's basically how the game is now right? NM/Dungeon drops aren't the best gear in most cases.

Crab Bow HQ is better than Verdant bow.
Jade Hora HQ is better than Verdant Hora.
Engraved Bhuj HQ is better than Canopus Bill.
Banneret Lance HQ is better than Canopus Guisarme.

Why is it that people still going after the dungeon drops in light of this? Because it's safe and to a degree guaranteed. The differences aren't that great unless we're talking +3s but either way they're still technically better.