So I can't get any dailes in wrothgar or Summerset... I've deleted all my quests in my journal but the main one - and i've relogged - turned off all add-ons... I was getting shares last night...
It's possible you've hit the daily cap. If I remember, you can only do 40 dailies in a day then have to wait for it to reset (not sure when that happens). Any chance you've done near that many?
I'm having the same problem. People were trying to share quests with me tonight right after reset and I wasn't getting any of them. Maybe the first one or two people didn't know how to share a quest but after about six it's obvious there's a problem. I had only actually picked up two quests of my own but even over the past few days couldn't have had 40 quests shared with me. I finally gave up and submitted a bug report.