Why vertical progression is poorly implemented

[Elim]

Yeah... gear progression in this game is messed up. IMO.

If gear had bonus'/set bonus', less gear would be obsolete when higher Ilvs are introduced. Not to mention gearing would be less bland. Every item could have it's own bonus(a piece could increase movement speed, for example), and if you wear three pieces from x set you'd receive another bonus(another example: increasing movement speed even more...). There could even be a full set bonus further making collecting gear more appealing. People would have to choose between stats, gear bonus' and (full) set bonus'.

I doubt this would ever be implemented, but damn it'd be amazing.