What do you think about small vehicles being added like a bicycle or even a wagon. The bike you could use as faster transportation and could have a small amount of storage on it. Also on the bike allow the human companions to ride. (Sorry Dogmeat) As for the wagon make it so that it slows you down when pulling it but let it have a lot of storage, somewhere like 400-500. Also if the devs even wanted to, they could make it harder going up a hill and easier going down it. I think that this would add a unique element to the game because with the wagon you can store so much more but you have to keep track of it and pull it around. Another thing that you could do is make it so that you cannot fast travel with the, or only to a settlement to make them a little bulkier.