This. One of the worst things, in my opinion, to happen to MMO's was the proliferation of "no drop" or "BoE". Don't get me wrong, I completely understand why they did it. But the effects the "cure" had were worse than the disease. People don't often think of how many things had to change to accommodate BoE/BoP game play. The effects on the economy, how you handle old content, farming ect--were all dramatically shifted.
I understand there would have to be shifts in how instances work, and even how farming works (Bots ect). But really, getting rid of the BoE tag would increase instance lifespans and make it possible for people to use the community to fill gear gaps, rather than having to shove tokens and loot work around in everything. I mean, imagine if when you see your 10th cleric bracer, instead of being frustrated, you go and actually contact the other guilds in your tier/skill range and make some trades? That's the essence of community.
And more than anything else, these artificial systems subvert that.