We should be able to send companions back to their original locations. Right now, the dialogue box only gives the option to dismiss your companion to one of your settlements. For example, if Nick Valentine was my current companion and I pick up Dogmeat, I can either send Nick Valentine to any settlement of mine or he automatically goes back to Sanctuary (because I had assigned him there before). There's no way to send him back to the Valentine Detective Agency unless you've never sent him anywhere else. This is ridiculous... I mean, Nicky-boy's got a detective agency to run in Diamond City and I don't want every single one of my followers holed up in Sanctuary when they're not with me.
Patch or mod; I'd be happy with either. Whatever gives me the option to send followers back to their original locations.