I’ve noticed something that I think is particularly relevant to these type of events:
I enjoy them most when I play in the morning before work.
It doesn’t matter what the DE is, there are fewer players on in the morning which genuinely makes the bosses a challenge, and therefore a lot more fun. An example is the final centaur boss in the Harathi Hinterlands, about 8 of us did it this morning and we scraped it with a second to go on the timer and people being rezzed constantly, that made the fight interesting for the first time, despite having done it 5 times and the only time ive managed to get a gold.
The bosses do not have enough skills that effect enough players to counter that many people, and very few interesting objectives (although some have a timer) to occupy people not being attacked.
It sounds like the shatterer has a similar problem, so I think the way forward is to play it way off peak time currently until a solution is devised.
I had exactly the same experience yesterday, managed 2 of 5 hearts and 1 out of 4 dynamic events I came across, the rest were either bugged or the boss/objective simply wasn’t there to complete them with.
I did think maybe I wasn’t looking hard enough but I had a good long look at all the points, the most obvious one was the small set of ruins with a heart in them which had a flame legion shaman dynamic event in them, the heart was out of place presumably to do with the event but the shaman simply wasn’t there.
Got a bit fed up with the area pretty quickly.