I understand where you're coming from, but you have to realise that Heavensward started with even less content. This is just the norm for new FFXIV expansions. You don't get to start with a lot of content, but it gradually gets patched in. You can't just rush and no-life everything and then act surprised when you run out of things to do quickly. The game isn't built for that.
Personally, I still feel like I have plenty to do. I do my roulettes when I get back home from work to get Tomestones, and after that I have some time left to do Deltascape Normal for my PLD and WHM or Savage for my DRG. This is usually enough to keep me busy until the weekend, after which I can start leveling other classes. And if I've capped a new class, I can use that to run Susano or Lakshmi to get a new weapon and new accessories. Not to forget PotD, crafting, collecting minions or mounts... Sometimes you just have to be creative to keep yourself busy.