A the moment when a friend is away from the game for several days all we are able to do is visit to keep in producing and buffing there buildings, it would be good if we were able to rebuild some of there things that have stopped producing ie: mines that have become depleted, fields, wells, marble, stones and so on ( i think you get the picture).
To do this you would have to use your own resources, showing your friend or guild team mate what this game is all about ....friendship/team work!
Just think that it would be more interesting instead of just visiting and seeing things demolished and not being able to do anything. Doesn't matter how well you plan things before you go away there's always something that happens, and when you return all your doing for several hours is rebuilding instead of getting on and enjoying the game.
Well what do you think? ( only an idea ...don't shoot me. )