I don't think Age of Ultron really feels drawn out, mostly because the issues are coming out at an alarming pace. I'm seriously surprised that Bryan Hitch has maintained the schedule with some modicum of success.
And about Trinity War, I'm not sure how I feel about this event spanning Justice League, Justice League of America and Justice League Dark. I don't read Justice League because every single character but Aquaman is pretty boring. If Batman was more like Snyder's Batman, I would enjoy it more, but he wasn't, so I dropped it after about 4 issues, though I would like to read the Throne of Atlantis story at some point. I do read both JLA and JLD (good to see them getting some love, especially Frankenstein), so I will check out Trinity War, but I'm not a big fan of DC spanning there "events" across multiple books, forcing you to buy stuff you otherwise wouldn't read.