Legendary Itens share with the Blesses the one of hardest currency to farm: Odin Marks. The total of Odin Marks needed for a character hits an impressive mark of [1000 (lvl 80 Legendary) + 400x4 (Blesses)]x 59 (actual character number) = 82.600. A mark really hard to hit. But it is not a problem: the Odins are make to be hard.
Because the problem to get Legendary for all the characters we start to get new legendary itens in events, like the actual Dark Dimension Portal Shard. Is a good thing to give for the characters who still dont get one legendary. But this ones cannot be trade os sell, and after some events is easy to someone has one legendary for each character (or even more then one).
Back to the day without the level 80 legendary, people use the hard earned Odins to make lvl 70 legendaries. But then the lvl 80 hits the server, we get complains about the waste of Odins in the 70 ones; but there is a recipe to trade this legendaries to his Odin Mark cost. As reflex, everyone can buy a lvl 70 to use until get marks to buy the 80 ones, and recovers the Odins lost to buy the 70. But this is not work to the 80 ones: you only get 80% of the Odins back. No problem again: this is to make the people think before buy the lvl 80 ones. But if more Legendary lvl 80 item are created and the player want change the lvl 80 from some character, he will lost 20% of the Odins used...
I wrote all this to be used has base from my suggestion; a "why" I'm suggesting this:
The exchange Legendary for Odin Marks based in the Rank Level
In resume: If you exchange a Legendary who has more ranks, you get more Odins Marks for it.
Let's see now how this will works for each type of legendary:
The Normal Level 70 ones:One more way to help the players to jump to the level 80 ones. Giving more xp to the 70 ones will shorten the time to get the 1000 Odins needed for the lvl 80. Of course, is not a giant boost, but something extra to exchange the used max rank lvl 70. A minor boost, but can help. But the suggestion will better help the others categories.
The Normal Level 80 ones:With this suggestion, the problem of exchange a level 80 legendary then a new lvl 80 legendary born are suppressed. Simple: If the lvl 80 are maxed, the Odin get by exchange is the original cost of 1000! So, if you buy a 80 legendary thinking "I can change in Odin later", you still need to up the one to max rank only to get the original cost, who make the staff idea to "dont buy a lvl 80 without know what your are doing" still on. Plus end the problem to exchange the ones everytime the new one are born.
The Event Ones This ones are a major problem. They cannot exchange because are given free and exchange can break the "Odin Mark economy". But is also frustrating getting one in a event and cannot do anything if you don't want use it. And also frustrating to create a new legendary who no one will use because so much factors. To this ones, my suggest shinnies: First then all, give the possibility to change an unranked event legendary for some Odin Mark (can be only one, but still something). After that, exchange a ranked/max ranked event legendary can give to players more Odins, up to a Bless cost (100 Odins). With this, the event legendary will be used; or to be maxed for a full exchange for Odins, or to quickly be traded to the minimum, plus the already planned uses. And everyone will be happy to find a new Legendary item in an event!
Well... this is my suggestion! Now time to start making my future suggestion for the "End of Uniques" event...
And, summoning @Asros