A Weyland-Yutani like conglomerate wants to colonize exoplanet in the habitable zone of the orange dwarf 0.75 M of the Sun. The planet has
- 2 X Earth diameter
- 3g surface gravity
- atmosphere 92% Nitrogen, 8% Oxygen
- 3 X Earth atmospheric pressure
- 45 degrees axial tilt,
- Temperature varies between -70°C winter and +70°C summer
- Mountainous terrain
Due to unsuitable condition for human life board decided to keep the human colony on the planet's large moon which is similar to Ganymede, and to genetically design small near human. The objective is to keep this "hobbit" as close as possible to humans while being able to survive & thrive on the planet.
What changes should they do to human DNA assuming near future technology where genetic engineering could tweak human organs and adapt human DNA to produce systems seen in other animals (like bird respiration, winter hibernation, Pentachromatic eyesight etc) ?
How smart would the hobbit be if it has similar brain to human but it's size is limited to <1M?
EDIT I would prefer if possible to keep them look like children and their IQ to be on a pre-puberty level children 10-11. The reasoning is that humans won't treat them as rivals, and they won't be smart enough to be competitors that could in the future chase humans out of the system. So the coexistence must be beneficial or the very least neutral to both sides. Using force to fight future insurgencies from the hobbits, or some colonists killing planet inhabitants because they look like monsters is definite no no.
The humans could teach them things like traditional agriculture, making cloth, hunting, make simple (adobe, plank houses), knowledge of herbs. But not advanced staff like engineering, pharmacy, etc. Trade with humans is OK if it's profitable for the humans, but they should be self sufficient as far as possible. Planet could support billions of them and conglomerate doesn't want to waste resources on them.