I've tried to compile the most popular suggestions from alpha testing, from forum threads to what I've seen youtubers talk about. This isnt all suggestions, but these are the most popular ones I've seen talked about.
Please don't post suggestions in this thread, as they'll eventually get buried

Redesign of power connection (relay hubs, hold to connect several outputs, etc)
https://forum.planet-nomads.com/thre...nnecting-Power

"No power" icon when in buildvision.
https://forum.planet-nomads.com/thre...in-buildvision

Weaker bushes/plants.
https://forum.planet-nomads.com/thre...Impact-Realism
https://forum.planet-nomads.com/thre...are-too-strong

Ability to build prefabs:
https://forum.planet-nomads.com/thre...dback-Building

Dragging to build(similar to what the editor had)
https://forum.planet-nomads.com/thre...dback-Building

Block orientation changes/rotation
https://forum.planet-nomads.com/thre...ttings-driving

Wheel arrow color based on settings like speed.
https://forum.planet-nomads.com/thre...in-buildvision

Increased wheel traction/friction(possibly have traction relative to speed?)
https://forum.planet-nomads.com/thre...n-Flat-Terrain
https://forum.planet-nomads.com/thre...ttings-driving
https://forum.planet-nomads.com/thre...e-observations
https://forum.planet-nomads.com/thre...itial-feedback
https://forum.planet-nomads.com/thre...-Tire-friction

Easier way to flip vehicle(Cut and paste, grab and pull a block, auto flip relative to cockpit, etc)
https://forum.planet-nomads.com/thre...y-flipped-over
https://forum.planet-nomads.com/thre...pression-of-PN

Game should check if a vehicle/building is in contact with the ground anymore when drilling. To stop hovering/stuck vehicles
https://forum.planet-nomads.com/thre...hole-in-ground

Rotors being able to be powered
https://forum.planet-nomads.com/thre...rk-in-progress

Functional Jacks:
https://forum.planet-nomads.com/thre...isting-Vehicle

Map/GPS co-ordinates.
https://forum.planet-nomads.com/thre...Map-Navigation

Ability to change keybinds
https://forum.planet-nomads.com/thre...nd-suggestions

Adjustment of the day/nigh cycle (Even though days/nights are the same length, nights still feel a lot longer, possibly a clock/"time till day" feature)
https://forum.planet-nomads.com/thre...ay-night-cycle

Crosshair recolor/border
https://forum.planet-nomads.com/thre...-when-building
https://forum.planet-nomads.com/thre...dback-Building