Yes!!!! I say at least once a day how much more I would enjoy the game with this simple change
It's hardly a simple change. Frankly, the absolute strongest argument against it is the sheer time and development effort a full-on guild system would require. Extending many of the wing mechanics to accommodate groups that already exist but mostly have to coordinate out of game is basically a quality of life improvement to make something that already exists less of a hassle. Anything more than that pretty much automatically means that some other potential feature has to fall by the wayside.