To be quite honest, even if Dynamis is more inactive to the other established servers (I don't like to use the term dead), who cares?

With the availability of data travel center, it's not like there's any content in the game you are prevented from doing due to it having less player population since you can just hop to other DCs to either RP/raid/PvP etc.

It's not like you are trapped only Dynamis and have to beg people to join your party to do stuff (Materia on the other hand oof).

Seriously, this is so like making a mountain out of a molehill.