One of my biggest gripes with this game is this reluctance to add interesting stats to gear. It's SOOOOOOO boring to upgrade your gear when all it offers is a boost to the main stat. Many games, including Diablo, WoW and TESO use a system where each piece of a set adds boosts to certain skills or adds new ones. This is such a cool system since it encourages you to get the rest of the set, either for the abilities or for vanity. Why can't we get something like this?

EDIT: Already mentioned while I was typing