I am really enjoying grounded, its been a long time since I was this invested in a game.
There is an endless amount of possibilities for this game, a few of my ideas:
Worms, mice, Rat Boss, woodlice, dragonflies, cokroach, Wasps, Grasshoppers.
I also think Mobs should be scaled to how many players are in the world as multiplayer can be very easy with multiple people hitting a target.
I am really looking forward to see how this game develops, maybe Market the game as a survival Horror to increase interest, as when I first saw the trailer I thought it was a kids game, and its definitely a game for kids and adults alike.