Allowing for non-carnivore additions would also help.

Looking at statistics from furscience.com, you can see that the most common choice is actually a hybrid of animals.

Even among those hybrids, many are unable to specify due to the vagueness of those fantasy species such as Dutchies and Sergals, to name two of the more popular ones.

I feel like Massivecraft could benefit from a TRULY unique species, something that would become a sort of calling card for the server among furries.

But really the biggest appeal to furries is aesthetic choice, making each subrace vague and allowing for more aesthetic freedom among them, with canines, felines, rodents, marsupials and more. Best to cast as wide a net as possible without getting TOO specific.

Perhaps a focus on genetic modification and adaptation to environments based on a background generalized but unspecified Mammalian creature acting as the original base. Prompting a "search for the missing link" among Varran to find 'the original form of Varran'.

It would be interesting to have a more drawn out discussion on this, you never know what people could come up with.

For more info on the species stuff btw: https://furscience.com/research-findings/fursonas/3-1-species-popularity/

that link contains gathered information from surveys of furries.