I'll agree that the Crystal and Primal pf issues are somewhat valid, but you can't attribute the Dynamis issues to DC travel. At best they slightly made the issues work, but the bigger problem is that no one wanted to go to Dynamis to start with and we didn't see enough NA player expansion in Endwalker to really justify them - especially an additional 4 worlds for Dawntrail. The issue with Dynamis is the same as Materia in that there is no GOOD incentive to go there aside from maybe easier housing. People need a great reason to uproot their habits, leave their FCs and friends behind wherever they left them, and contribute to building a new data center from the ground up. And the devs simply have not done that. Extra exp and some gold chocobo feathers aren't going to cut it.