Potential Solutions

1. Limit DC Travel to Dynamis - Now I know there were people who weren't happy with this when Dawntrail came out, but this is the only time I have ever seen Dynamis active and thriving with the same consistency as Primal or Crystal in terms of the number of players and the content popping. While this is not my ideal solution, having a near dead Data Center is even worse in my opinion.

2. Cross DC Parties - This is something I have seen thrown around by a lot of members in the community and I don't know if it would be entirely feasible due to how the different servers for each DC would need to communicate. But for the most part, this would be the ideal solution. Now I say most part because while this works for instanced content, this is not viable for overworld content such as Fates, Hunt Trains, and Treasure Dungeons to just name a few.

3. Further Rewards for Joining/Playing on Dynamis - Now I don't know what additional rewards you could give aside from the 1 mil gil for a new account that wouldn't have players crying foul or unfair. But I feel like hard hitting incentives are needed to draw people to Dynamis at this point.

4. Collapsing Dynamis into other DCs - This is what I would consider the last resort/nuclear option. If the first two options either aren't feasible or still don't see an increase in activity on Dynamis, then the worlds on Dynamis should be migrated to other Data Centers. This would not only serve to give those DCs room for both returning/new players to join, but it ensures that new players don't arrive on a data center where it takes a long time to queue into A Realm Reborn content. Now as someone who works in IT, I can only begin to imagine the scope and logistics of such a move with everything that would need to go into it and I doubt it's something that Square considers lightly.

So, those are my thoughts on Dynamis. And I want to say, despite all of my critiques and criticism of Dynamis, I still love the community that has been built up on this Data Center and would hate to see that go. But feel free to let me know your thoughts, any potential solutions you may have or if you disagree with anything I've said here.