I don't think a rear mounted winch is overkill.
It all depends on how the vehicle will be used.
I often think of how a rear winch could be incorporated into my vehicle, DII, but that is because I am often traveling remotely with my family solo in one vehicle and no other vehicles to help out. Sure, we travel and explore with others but when we want to go and nobody else can or wants to, we don't let it stop us. Even with other vehicles it is nice to be as self sufficient as possible.
If I ever do it I'll want to make sure it is as light as possible and hidden.