Edit: nevermind, I just didn't notice there already was one
I've had a few times, especially in the early game, where I stumble on a bandit patrol just outside of my base that I can't take myself, with villagers nearby enough that they could get to me in time, but not close enough to aggro on their own, and then I have to risk getting got, or at least taking a few hits while fiddling with the menus.
It doesn't ruin the game by any means, but it's kind of a pain. It would be nice to have a "get the hell over here" key for emergencies, and maybe to have the call to arms button in the menu order them to assemble/gear up at the nearest rally point, or have that as an option.