Note that everyone has a unique style of writing. I do believe that storytelling has improved since the first LS and Scarlet Briar. However, there are some long running concepts that I have issues with:
Warning this will be highly critical, but positive criticism is intended.
1.) On the Subject of Dragons:
Let me draw a comparison here between Gw2 Dragons and HP Lovercraft. When HP Lovecraft first created the cosmic horrors, he did so with the intention that they were not good or evil but simply just "different." The grand idea behind lovecraft's works were that cosmic horrors were supposed to be beyond human understanding. They simple go on with tasks and motives that are incomprehensible to us. While they don't really go out of there way to annihilate us, if we just happen to be under their foot when they are taking a step then we just get crushed. Humans are that small to them. In the beginning the Gw2 Dragons were supposed to be portrayed in the same way. They were supposed to be "forces of nature" whose thinking was supposed to be incomprehensible.
A long time ago when all of this was first created it would have been better to make the dragons and gods "distant powers" like the Aedra and Daedra from the Elder Scrolls. Instead of direct confrontation, the world simply deals with their fall out and tries to stay out of their way. This original concept was ruined a long time ago when dragons started being personified, which was a huge mistake. It started with Zhaitan, then Mordremoth, then Kralk. The problem is, when the dragons started becoming "villainous" and talking to the players they didn't have any personalities or motives modeled correctly. They are simply "generic evil bad guy voice."
There really is no difference between the voice and motives of Zhaitan, Mordremoth, and Kralk. They have no personality and either should not have been personified in the first place (they could have remained mysterious) or their personalities should have been properly thought out and properly storyboarded.
2.) Metaphysical Jargon
Because the dragons were not well thought out motive and personality wise, along them comes all this crazy metaphysical jargon that is not the least bit interesting. There are still holes and confusion surrounding dragon energy, corruption, etc. There are no simple explanations of why dragons need to corrupt in the first place (which would be find if they were NOT personified and just remained mysterious eldritch horrors). I think this hurts the plot because 70% of the plot is trying to explain complex and overly convoluted fantasy physics rather than real plot development.
The whole "tyrian balance model" and "eternal alchemy of fancy glowing lights" is really not understood by anyone other than the behind the scenes plot writers. Nothing about these metaphysics is conveyed well and we just get pointless visions then additional plot points that assume we have the faintest idea of what this model means. Metaphyiscs being the primary driver for the plot is just... so anime and just plain bad these days.
The drivers for plots should be:
-Main villain's motivations such as flawed beliefs or a cause the audience can understand/relate to (e.g. see "thanos was never wrong")
-Inter-party relationships and human emotion
-Major events caused by mysterious higher powers (e.g. gods, dragons, etc.) but the higher powers should not be the focal point. The focal point should be the strugglers.
I feel like all of this is going to end in some incomprehensible cloud of fantasy ideas that will be rivaling the end of Neon Genesis Evangelion -in which the creator is the only one that really gets what's really going on and why it wrapped up the way it did.
3.) Flat Characters with no Interplay between each other
Braham's 180 to complete jerk without even talking to the party about his mother's death? Rylocks pointless withholding of information from the party about how he became a revenant? I mean there are just so many pointless and not really well meshed motivations for dragon's watch characters that make them just flat and unlikable. They all seem like paper cutouts to drive a bigger plot forward. There are no set personalities. One day Braham can be a jerk and the next he is a gallant hero saving children with his mighty guardian shield. Develop SET personalities for characters that change as a direct result of BIG EVENTS and have them talk to us about those changes when they happen.
There is so much strangeness in behavior. I mean where was Kasmeer's total freak out and church girl breakdown after balth goes bad? Gwen pops in up in LS5 as a ghost aiding the group and says NOTHING to Logan Thackary while she is there? There is very little character development and really the only/most developed character is... Canach -who most people like and is tolerable because he actually makes sense (being a rogue who turned around to become a part of the "good guy" troupe while still maintaining his rough edges).
The most important take on this is that characters should react to certain events based on the PERSONALITY THEY ARE BUILT WITH THAT IS PROPERLY CONVEYED AND UNDERSTOOD BY THE AUDIENCE.
4.) Death is cheap in Tyria
It bother's me how little death matters with so many dead entities (Koss, Glint, Gwen, the Main Character themselves) dying and coming back in some form or another. Dead should mean dead. When you cheapen death and bring people back you really hurt long term plots and your ability to make impacts. I mean if a character dies and we go "oh they will just come back later" we might as well be in the comic book universe. The whole deal with the commander dying and coming back so easily just cheapens death as a whole, which is dangerous for any story because your audience just stops caring or feels no impact when people get knocked-off.
Generally I hate hate hate resurrection plots unless the sacrifice is astronomically great and felt across the central characters for the remainder of the story. Coming back from the end needs to always come with huge penalties that are unrecoverable. Better yet, if you kill someone in the story -make it meaningful and keep them dead. Bringing back anyone just cheapens their character unless its done for a really really good reason.