Trust me, the garbage feeling goes away once you get to sans. Especially if you spare him.

I wonder what other DLC will be announced. All of the DLCs together cost 40$, so that can only mean that there is more to come, since they are raising the Season Pass price to 50$ who would pay more for a bundle?

Which missing factions are you wondering about? All the ones from New Vegas are on the other side of a continent and Im fairly certain the Enclave have been eradicated at this point.