How about making a place (like market) and peoples can set up trade marks by clicking a button, which can set what they sale or buy for, and the price. It looks good if it does. + If you agree.
There should have a... Friends Tab. Locking is just OK because you can see your locked players in the map, but Friends Tab is way more better because, you can chat with them and know where they are easily.
I hate soulbound thing, why I keep attack the dungeon boss while others didn't attack, but they got pots. And I didn't get any valuable items? It is unfair!