New areas, titles, skills, or game modes would’ve hyped me way more tbh. Bringing back old stuff just seems low-effort to me.
We know from years ago that they don't like to mess with title tracks since it's all interlinked with GW2 and changing it is probably quite complex and it would also mess up the Hall of Monuments Calculator (which is by now so ancient that it still uses Flash which has been completely dead for over 4 years now. Changing that is véry unlikely to happen as it requires vastly different skills than those required for making changes in the game itself.
Adding new areas is something that you also shouldn't expect to happen: that requires quite a large team to do. I could entirely be wrong here, but I think the last new area that was added in the game was The Mausoleum and that is rough at a few points (for example it has no map texture). That map was also made from existing assets and back in the day when there was an actual live team for the game.
Creating a new area is simply out of scope... you need map artists, creatures need to be spawned, designers, quest designers (otherwise there's not a lot to do in the map) and finally you'd need the QA team to test the new area. That's a lot of work.
Making new skills, like with the previous anniversary, was something that was done by the person who did almost all of the coding of the skills and balance patches for the last few years of GW1's Live Team (Joe Kimmes - who is still at ANet as far as I know), but adding new skills still takes a lot of time and effort since these need to be tested and to be honest, it is quite hard to create well balanced and cool skills.
Adding a new game mode also takes a TON of effort. It's not as simple as just adding a toggle. For example, when they created Hard Mode, that required ALL areas of the game to be revisited by the developers and they modified quite a bit (monster skill bars, AI behaviour etc). It would require a TON of development time and money, money that they probably will not be able to recuperate (because let's be honest here).
The changes that have been announced are sane changes that the current game team can handle and will have a positive impact. It can give incentive to play content that isn't played as much anymore and can revitalize content.
However, what they do mention is very interesting. I would love for more variants of for example the Soulbreaker Scythe to drop. I would even love it if they took that skin and created some variants of it, for example a black or fire version.
I like the tease of "new loot". I'm curious what that could be!