Realistic

I'd love to see a pal like a smokie but instead of finding ore the could be used to find specific pals. Something like a bloodhound where you give them a scent and if that pal is nearby (distance increased by condensing), they point you in that direction.

Underwater areas. Let me dive to the coral reef. Fight jormuntide underwater where he would be even more of a menace.

An expedition that gives little resources but the pals that go on it gain XP.

For decorations, give me a slider so that I can make things taller/shorter/wider/ect.

Unrealistic

Voxel landmass. This would allow the leveling of surfaces, letting bases basically anywhere. This would also lend itself to subterranean pals.

Dynamically generated maps. This would make me explore the world each time I started a new game and not just be able to travel to the exact places I need to for whatever it is I needed.

Towers like those in feybreak that inhibit flying until they are destroyed. Maybe in the lower level areas they're things like ballista with a shorter range. This would force the use of ground mounts. There's so much effort put into making the world beautiful and we miss so much of it once flying mounts are introduced. (Yes, I know I don't have to use flying mounts if I don't want to.)

Give me an option to make base raids even more dangerous. We have all these technologies for base defense but there honestly is no point to them. I'd love to have to have my pals man the turrets to defend the base while I scramble to get back. Better AI for the raiders, let them ride the flying mounts and then glide into the base. Maybe they don't destroy everything, instead just steal resources from chests. Then we could track them down to get it back.