I wish you could build robots to protect your settlements...like maybe cap it to 3-5 or so..
Offer a protectron..a gutsy..and a sentry bot..and of course the strongest requiring the most, rarest materials.
I think that would be fun..either dlc it or mod it into the game..

Eyebots! Poor combatants, but they'd run and warn settlers if they found hostiles tougher than rad roaches.

Yea forgot about eyebots...also maybe some securitrons from NV, and allow your characters face to be displayed..