I hate twinks.
But NO DROP is bad for economy and for gear grind.
Ever been in situation when mob drops 3-5 pieces of great gear and they all from classes that are NOT present in your group/raid ?
NO DROP makes its impossible to trade it for something you could use.
BUT,
REQUIRED LEVEL is a good option.No more lev 5 twinks in planar armor
Another good thing for economy are ATTUNEABLE items. This will prevent good gear continuously being passed down from player to player diminishing its value as more and more added to the world. It also will prevent devaluing of trade skills. (Back on LIVE in 2004 already, all tradeskills under skill of like 300 were useless, because you could buy better items from players for just a few plat. )