TL;DR version for this massive wall of text:

Main takeaways:

1. No info on when it's out in Japan, but it could be a while because many people in Japan were not happy with the CBT.
2. Western release is only a possibility.
3. Free-to-play but with a cash-shop that they promise will only be for cosmetics and other items that do not give any in-game advantages.
4. Purely action combat gameplay only, no tab targeting at all.
5. Only 4 classes available (more will be added later).

Pros:

1. Transmog will be available.
2. Story was said to be very, very good and full of character development with good voice acting.
3. Raids were said to be very epic.
4. Game performance was said to be quite good, but a little wonky in areas with lots of players.

Cons:

1. Complaints about dungeons having no map currently, so difficult to navigate.
2. Crafting system was one of the biggest complaints with the main complaint being that it is too slow and not rewarding enough.
3. Skill/talent system was found to not be very complicated or interesting.
4. Character customization was found lacking.
5. Skills were said to be "not unique enough to your class".
6. Boss fights were zerg-fests and did not require enough thought or adaptation.
7. Enemies could aggro you from very long distances and potentially one-shot you.
8. Game UI was universally hated.
9. No possibility for guilds in the CBT (will be added at a later date).
10. Mounts did not have enough stamina (would be fixed).