If they don't do a proper coop mode instead of the complete rubbish "no cooperative base building, only host progresses quests and clients just help host, hm I guess there's no coop in this game after all" design from previous games they might as well not do anything at all.
My jaw is still dropped on the floor since learning how they could drop the ball on what could've been the singular most popular feature of the game. It's such a blunder of a tacked on useless thing currently that calling it an afterthought would be a big open hand slap in the face of coop gamers.
They should do it like Grounded/Halo Infinite with "Shared Save", which is the singular most awesome feature that has come to coop games since friendlyfire=off.