Yeah, Idyl is the main hub in HW for post game, much like Mor Dhona was inn ARR. Basically, wherever you see Rowena set up het tomestone shop will be the hub for that Expac. I do think it's sad that Idyl is so empty, but it doesn't offer much once you're done with Cenutrio Seals at the moment. Even Limsa is more populated, but only because of the fact that the market is right next to the Aetheryte... Honestly, though, I just port to my Apartment now since there's an MB right there and no RMT spam...
I was originally on Lamia also, transferred to Behemoth, so still Primal Datacenter. World of difference in my enjoyment of the game, but I have other reasons as well (such as joining the FC of the Twitch steamer I moderate for).