These are what stood out to me:

They finally delivered on their promise to make Sleipnir fly.
They're adding more metallic dyes finally, albeit orange and yellow which are ugly af, but it gives me hope that someday soon we'll get more.
We can go back to The Royal Menagerie—I'll probably just AFK there all day now.
The broom mount gets a special action, just in time for Halloween.
Ventures/Beast Tribe tokens finally making their way into the Currency tab.
Housing storage, which will free up a good two pages on one of my retainers.

Excited to run the new dungeon, raid, and ex-trial of course, but sometimes the small gestures make a larger impression.