While I too would like to see this, I don't think it would be possible given the the fact that Erewhon is designed to be the game's social hub. Some players turn it off, but others leave it on. Obviously it would be disastrous if every player was able to bring in their AI teammates. With up to 16 player capacity, the game just couldn't handle it. Keep in mind, Ubisoft originally didn't intend to have AI teammates in the game and we pressured Ubisoft to bring them back as soon as we found out of their absence. By that time, Breakpoint was just weeks away from shipping out to the stores. This is why the teammates never made it to the game until months after the game was available. I think for players that have the social hub switched off, maybe they could work with that, but I wouldn't bet on it given Erewhon's hub foundation.
I think it's best to hope for an improvement in the next GR. What I'd like to see is either an FOB or an aircraft carrier as the Ghosts' HQ for the area. In there, the player can bring their teammates just about anywhere. Only the chow hall or mess hall will be the social hub area for players to meet up and team up.