Okay, here's my full thoughts on my concerns with the expansion.
1. ArenaNet aren't releasing RELEVANT information quickly.
This is a big one, and one that is contributing to factors of people getting bored and hype dying down with the expansion. ArenaNet haven't given us a good frame of reference of where they're at in regards to numerical stuff, such as "We've created X amount of zones" and "There will be at least X amount of armor skins available". I keep looking over at FFXIV's expansion and the stream of information they're being given is breakneck compared to this drip feed from ArenaNet. Constant updates on the new classes, updates on what you'll be able to do in each of the new zones, updates on what you can expect from the expansion, art, music, etc.
This is all subjective as well, but I feel like there's not enough constant info dumps to keep up general interest.
2. ArenaNet's current betas are likely 10% of the big picture for the zones and expansion, yet where is the other 90%?
This one is really troubling me. I'm sure ANet's desire is to release "When it's ready" and only tell us "when we've got it locked down" but a PREVIEW of ANYTHING outside of Verdant Brink would be great. Perhaps explain to us how the three tiered verticality will go? Show us a "vertical slice" (tee hee) of the full content in the game, instead of having us beta test a zone we've seen for almost six months? General players who are interested in GW2 are getting tired of seeing the same thing - it makes people think there's nothing else in the expansion besides Verdant Brink.
3. With Verdant Brink BEING the only zone shown, how far off is the expansion and what will future betas be about?
This one is nebulous but very troubling. Since we only have Verdant Brink and no other zone (yet we know they're there), and it's taken nearly half the year to get to beta testing Verdant Brink's mechanics (night/day cycle), what does that mean for the other zones? Are they just going to take our feedback here, tweak the other zones, then drop them all on us in a future beta? That would be a huge info dump that people wouldn't expect, but I seriously doubt ANet would do that. They want to refine things before releasing them, hence the test of Stronghold, and the upcoming WvW test.
4. Where are all the masteries?
This one is also very troubling. Seeing as it's the second beta where we can see the mastery system take shape and fit into your hero panel, it is worrisome that the only masteries IN the system are ones we've known about for months. There's only TWO masteries for Pact Tyria, one for Fractals, and one for Legendaries. You'd think they would (going back to the drip feed info section) drop more info on planned masteries as soon as they're solidified. At least giving us names to speculate on would be great fun and keep the conversation going. One thing we can speculate on is the masteries under Fractals since their names weren't finalized until this build, which is the type of thing I'm talking about. Give us stuff to speculate over. If these are all the masteries in Heart of Thorns, I'm seriously concerned with their concept of "endgame" not being enough and blown through in a week.
5. The release date situation is looking grim.
All of this accumulates into one thought: their release date is most likely NOT August, but rather November, if at all this year. Their pace of development is extremely slow as seen by outside viewers, which doesn't bode well.
Aside
I remembered that portions of ANet have been working on HoT since about after the game launched. So there's probably portions of the game being built that have been ready for quite sometime, and hopefully it's just the mechanics they want are being built and then laid into place, much like building a great house on top of a foundation.
There's several more things I want to have detailed but their marketing team are likely holding them back (and their own policy) from discussing them. Tell us more about adventures you have planned in each zone. Tell us about adventures you want in Tyria proper. Tell us about wyvern fights outside of the one we've seen. Tell us about Mordrem tactics that supposedly the new AI will do. There's so much to discuss but they are so hesitant it hurts.