I feel the !-tab is a great addition to the game. Even though I tend to get a bit fixated on that tab and forget to look into roadshops of friends who aren't in any need and maybe missing a lot of nice goods to buy ;-)

That being said, I would like to see such a tab for followers too. For people with more then a few followers, like me, who also want to help them with boats and trees, it would save a lot of time not to have to look in each and every farm.