The sylvari are all connected to each other through the Dream. In the Tassof Series, I had to figure out how that works, and implement it. Does it simply make them more empathetic? How does that work? Can sylvari in the Grove feel what sylvari in Lion's Arch are doing?
It's widely known by the fans that Trahearne was killed off because people complained about him... but I think that ArenaNet broke the 'show, don't tell' rule, and that played a part - how significant, I don't know... but first impressions are important, and the Players got a really bad one of Trahearne.
The 'show, don't tell' rule of writing - what it is, a brief example, the results you can expect, and a bit of advice on why you should avoid breaking it.