If I'm reading this right, the Voth "in the sphere" aren't necessarily the same Voth seen on Voyager. Those Voth, while quite capable of defending themselves, weren't particularly militaristic. It stands to reason that there's more than one Voth City Ship, perhaps with some major ideological differences between groups?
Same Voth, but why are these Voth in the Sphere? Stay tuned to find out
Cyborg dinosaurs with lasers on their heads. This sounds like the sort of silliness TOS would have done if you built a time machine and gave them a modern effects department.
This could either be the most awesome thing in the game or just comically out of place. If it's as good as the Elachi humanoid/drone split, I hope you reduce the tailor fees, because I'm going to need new pants every time I fight one of those T. rex cyborgs.