The DlCs are going to be adding more planets and/or locations (both in the free DLC and the story ones, hopefully). We already have one location with low gravity, like on Elpis, and hopefully there will be more, as it’s a great addition, but it would be great to have at least one huge planet with higher gravity.
The gravity would reduce jump height to almost nothing, just enough to mantle and climb obstacles, but not enough to actually jump over them. It could also lower speed slightly, encouraging players to use cover carefully, as getting caught in the open would be more difficult.
The higher gravity would also lend itself to shorter, wider, tougher enemies that move slower and use ground based attacks.
Since there’s a whole galaxy of planets and moons to take inspiration from, so it would be amazing to show off more types of planets, rather than just differences in style (plant planet, city planet, etc).
Also, first arriving at the planet could create a fun interaction, where Sanctuary 3 has to avoid crashing due to the gravity.