Maybe using AoW Planetfall critters models to add more animals units

Can only do that if they share the same rig for the animations. Which most don't.

Could you modify the Shellshocker into a sort of 'glyptodon' mount as a defensive mount option?
These are glyptodont: https://upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Glyptodon-1.jpg/1200px-Glyptodon-1.jpg

So, the Slither model can be used as a mount, which is the base model the shellshocker uses, however because the shell I added overlaps the mount point of the slither the mounted unit/hero will be merged with the shell and it would look really stupid.

I will update this with primal fury and try add some mounts like the Kelpi though.

More options for spiders. A tier 5 Vampire and Dread Spider Broodmother, with Hatchling spawns on a cooldown, so they can keep walking away and spawning hatchlings, and maybe a longer distance 1 hex radius web ability as well.