There should be newer endgame content and I think level 20 shards could be the answer. Most shards on a 15 are pretty easy. There are a few issues with this I can agree with, Higher level shards for end game - #6 by Åsmund_T in that thread Potato had brought up.
While this in plain practice makes Hmc obsolete, I had thought instead of dropping gear it could drop a “Chaos Token” (Chaos tokens do not have a limit on weekly drops you can do it all in the same week). Using 5 “Chaos Tokens” could upgrade One piece of armor from +6 to +7, and Using 8 "Chaos Tokens to upgrade your epic +6 to legendary +6 then 8 more for a legendary +7 (This one can not be used to make the +8). If you Have an Hmc +7 Using 16 tokens can make it a +8.
Now, this may seem grindy and it certainly is, making “chaos tokens” a 50/50 drop would probably settle the grind at 36 tokens with a +6 epic, and 46 with a +7 Citidale wand. With a 50/50 drop rate, it will be around 72 level 20 dungeons starting with a +6 epic, and 102 with a plus seven.
The upsides of this are we will have something different to aim for while the devs are programming newer content. Something to do instead of afking at fellowship, and new transmogs.
Now how will this gear be made, I think I have a solid idea for it. We implement a new event that basically is a collective effort of all players (like Defend the realm and Explore the Realm), To build a new town. Upon completion of the event, the level 20 shards come out along with the gear.
Basically tldr. Level 20 shards will provide something to do and implement a token system of 5 per piece of +6, and 8 for +6 epic to +6 leg, 8 more to +7. Then +7’s dropped by stephoteph can be made into +8. This token system will have no weekly limit. Level 20 shards are something that we can do and if we make it this grindy the devs will have longer to push out another raid, dungeon, or even an overworld zone.