3) I'm not even mentioning all the rares I found over this time. None of them was worth anything. 3 days, not one good rare item dropped.
Why would you expect any different? People wanted them to buff legendarys, and all it did was reduce the item hunt to just a few handfuls of certain legendarys at that. And so since the item hunt is only about certain legendarys it really really reduces your chances at upgrades.
Looking at your gear are examples of what I'm talking about.
Witching Hour has AS and CD. What rare can compete with that? none
If you had IK Belt, it'd have LS which no rare can compete with.
Blackthornes has L% and LoH. What rare can compete with that? none
Lacuni's has AS and MS. What rare can compete with that? none
Ice Climbers has L% and OS. What rare can compete? none
Vile Ward is an example of a good legendary. It doesn't have exclusive stats that instantly invalidate rare shoulders such as yours. The life/sec and +armor are kinda nice to have bonuses but you wouldn't get those at the expense of other stats on a well rolled rare, and so rare shoulders are worth ID'ing. Same amulet, rings, glove and 1h'rs.
A few other legendarys are good design because they are more niche. I like Hellfire ring cause its really good for a non min/max dps stat (exp), and has a cool visual proc. Unity and SoJ's are nice because they are good against elites, but in general may not be best min/max ring compared to a really good rare and so you have to make a choice.
In general I think dps min/max stats exclusive to certain legendarys is detrimental to the item hunt and leads people to be frustrated when wanting to upgrade.