They feel a bit like dolmens that are less flashy but at least with dolmens you had a larger variety of enemies, a cool soundtrack playing in the background, and molag bal was a more intimidating voice at the end. Dolmens also had those pions that allowed you to speed up the thing but at the moment it just feels like a huge survive waves with no side objectives. Plus the atmospheric effects are not as intimidating. Like with dolemens you have chains reaching from the sky looking to pull nirn into coldharbor, if abyssal geyshers had more of a wow factor I could dig them a lot more.
My recommendations:
Add more enemy variants. Maomor, Giant sea serpents, netches , wamasu, lamias, dreugh, haj mota because there is way too little enemy variety. Its reskinned hungers, zombies, and spider things and it gets boring, the only thing thats different is the bosses.
Add a few more visual effects to put it up to par with dolmens
Add in more bosses, make a giant netch boss, a maomor crew boss among potential candidates. Add in an achievement to kill 100 abyssal geyshers please