The Chosen Ones

Idea about summoning of "Diablo" is great. What will you get after killing him?
What is the purpose of this "target"? Gold bonus for destroying it?
What about game points? Like as if you got 10000 game points - what exactly you can do with all this game points? And Combat King Mastery - the idea is that you will be able to spend honor points on spellbook upgrades?

"I think it's too much job trying to make already great items even greater. Also the balance can be shaken and don't we have enough problems with item slots?" - in this case you can add special recipe for average items to upgrade it to the new ones. In my opinion it is A LOT OF ITEMS in the campaign, but much of the good individual items not worth to be taken in the inventory in comparison with Set items - therefore I've suggested just something new for upgrading such individually good items. But if you think that it is too much already - I suppose you know much more about the items and sets added in Ch.10