Before specialization I think they need to work on integrating DoL/DoH into DOW/DOM better since they are a bit shortsighted atm. It's seen as more vanity, maybe some gear but overall housing seems to be the main focus. PVP doesn't seem as focused since best gear is purchased where they really should of have it where you can craft the best gear as well, unless I'm mistaken.

Ways they can improve DoL/DoH can be things like:
Treasure Maps that grant access to special locations in dungeons that one can normally not reach. These maps would be sold as x dungeon map and when used inside the dungeon would reveal a new location/open a door and allow for exploration to a special area where you could find treasure, a boss or just a trap. This would however be designed more towards premade groups since DFing something like that could be troublesome.

Learning Recipes, with the beastmen quest I'm surprised they didn't make learnable recipes yet,they could of made 1-2 for rank 2 and then 2-4 more for rank 3. They could of been vanity armor that mimiced what the beastmen wore or even vanity of their weapons or actually battle worthy gear.(Though this could later tie into housing where if they grant recipes for access to their forges and other crafting means that can be put into a player's house it could add depth to DoH)

Again with treasure maps, would say make sure to have different tiers as they expand on the system, they have the can only get 1 every 18hrs atm, if they release more maps say designed towards finding unique DoL gathering items or dungeon instance locations that they would both have their own unique timers.

The DoL unique gathering location map could have a price of needing a tribute in order to havea chance to find them, so say a Botanist had to tribute 99 rosewood logs to have a chance of finding the map, by doing this you start to dwindle down the useless loot on the market and actually make them useful.

With the Dungeon treasure maps could have the same 18hr wait time as the ones we have now but on separate timers so you would be able to get 1 of each of the maps and not be tied down to only finding 1/3 types of maps.

They have a lot of options when it comes to these concepts I hope they talk more about treasure hunting, cause while it was something I was looking forward to, I wish it did involve more than just finding maps, to chest to fight something, not everything has to be about fighting, it would be fun if they had maps that could actually be used by DoL or even DoH, DoL maps of course would send players to a unique gathering location and for DoH it could be need to make x item and place it in y location for a reward.

All the above ideas/concepts could be good ways to revitalize the market, since one issue atm is the stagnant items in the game or ones that lack value because other items easily replace them, if the Dev team can work on making the stagnant items useful again it will liven up the market a bit rather than the focus only be on a few key items.