I played a female in extreme difficulty as a solo player and I have some suggestions.

I was happy with the foxy face and squared away hair style in wildlands. This game needs to bring those back!

Injury system is pointless in extreme difficulty. I was shot multiple times and fallen down cliffs (I fell off a cliff that almost took half my health...nothing) and I only got injured once....while I was trying to get injured. It should take two hits to get injured in extreme and a 20 foot drop should give a minor injury, just so its useable. Also add a repel rope to get down cliffs. Regen health get rid of it in Extreme. I thought the stamina loss was fine and drinking water was good to refill it. I didn't really get to use bandages(just once), with regen health and not getting injured.

Like others have said gear level is pointless, change it to camo level that has a penalty when not wearing the right camo for the environment. All environments have dominate colors, as long as your gear matches you wont get the penalty, next its just the matter of the camo level. I would like to try out all camo too, like desert. Plenty of grass, trees and snow, but no desert?

Night needs to be darker, I don't even need to use NVG at all. GRW had night darkness perfect and I loved using NVG.

if AI teammates are still a long way off I would like to see gun turrets on vehicles that are automated in vehicle controls (seeing how high tech everything is). It sucks driving around in them solo now.

Wolves should be out hunting you down, not sitting at a desk waiting for a drone to find you. That's just not what a ghost does!

All I can think of right now. I do like some nooks tho, like the ship wreak with the pirate booty. Those are what makes exploring fun! More of those please.