Hello.
I want to start by saying that I absolutely love this game, both coop and solo. Really fun.
But I am a little bit disapointed when playing solo, mainly with the npc teammates. Though I believe it is something that can be fixed.

.Teammates can't interact with objectives/items.
When playing solo, you as the player is the one who have to pick up and click on everything, which gets a bit monotonous.
One solution would be if when you targeted some item or enemy and gave your teammates the GO-TO order they would actually interact/grab/pick up the item just as the player would. Then you could for example order your teammates to start a rebel radio transmission while yourself give cover.

.Teammates won't stay in the vehicles.
They always follow you out of a vehicle whenever the player disembarks. Which is a bit annoying when you just need to step out for a few seconds and they immediately disperse to cover the area. Sometimes you also want them to stay in armoured car and provide cover with any attached weapons while you run in and grab intel or a target.
Solution to this could be that like above, if you target a vehicle and give the GO-TO order they would embark or if you could give the HOLD while in a vehicle and they would stay in their seats untill given a new order.

.Civilians don't fear guns enough.
I want to avoid any civilian casualties when playing but many times, instead of running, civilians stops in their tracks and cower. Even right next to someone firing a weapon. Which is quite unrealistic and makes very difficult to avoid casualties during certain situations; when you for example knows something is going to explode, if it's going to be a gunfight or your placing explosives and you can't make the civilians disperse.
This could be solved by if the civilians were set to run away a certain distance when someone fires a weapon instead of cower half the times.

.Teammates can't change gear.
This is more of an immersive issue and that has been mentioned by others.
It would be really cool if you could change the gear on your squadmates so you can all wear camouflage or if you have the same shirt.
The npc's even mention that they havent changed underwear in days so I would asume that they would appreciate it as well.

Bonus:
This is more focused on the player but I would personally love to see the option to be able to select no secondary weapon. Partly to make it more challenging at times and also for immersive reason so you don't always look like Arnold Schwarzenegger in Commando.

Thanks for reading and thanks for a great game!