I could do trade or not, but here is my issues with loot:
Some items are way too rare. It has taken way too long to get an axe off Orobyss for my VK in solo. I FINALLY got one with 1 lp (which brings on the next point) and got to play the legendary slot machine, which chose pathetic.
Exalteds that drops nicely, even for consumption to a legendary are extremely rare for a good one. I had an axe with 304% void damage on it that I rolled for my Axe and it chose some awful awful awful stat that I just dropped the axe at the cache and logged out.
Why is this? I knew I was going to make a Void Knight and after a month and a half, yes, THAT long, I finally got the axe with Void Damage where I was able to use it on the Apathy of Maw.
Then, nearly one month later I got my axe. I was VERY hesitant to even do the legendary cache as I feared disappointment which I had gotten in 10 out of my last 11 trips there (eight of them had a 75% chance to roll something useful and they chose the 25% awful roll). I go to the dungeon and roll through it then pop the two axes in and it comes out with 63% chill. I just dropped it on the ground as two months wasted, left the dungeon and logged out for the day.
Your loot problems are not related solely to trade, they are related to this scenario. You put a cool feature in the game and time and time again someone lacks one of the two items to even attempt it and then the possibility of getting the wrong affix after two months making your time wasted.
Solutions for this need fixed or you will simply drive away players.
If you leave the current unique / legendary system in place and even modifying the rolls to drop more rare items, items should roll with 1lp
The legendary potential number of 0-200 should be for 2 lp or more, and adjusted
Exalteds should roll better catered towards your class (four to six weeks for a void damage modifier on an axe, can’t truly recall)
T4 dungeon boss has entirely too much health and is extremely, extremely not melee friendly (this needs looked into as well)
Other than this, loot is decent. You can do much but if you want longevity, people need to be able to acquire items at a reasonable rate. I am not talking about 6 hours in and being geared like Diablo 3. But Diablo 3 does have levels of gear which you find an item and progress to loot hunting better rolled items and once a character is done push it to the max (Greater Rift 150 which I have done solo and in group play) or roll another character and make it powerful as well.
You should want people to want variety and not spend 500 hours in a season on a single character, that will bore them. They should yearn to make another character just as strong as the first one.