The freeze on xbox one really needs a fix and It should be possible, otherwise it is unplayable.
Framedrops to low 20s unfortunately seems to be a standard on many games, it´s a shame but it is what it is.
With that said, I´m not buying fallout 4. Not because of performance, I just don´t care about the game.
I care about TES though and I hope Bethesda gets their shit together before TES VI, and I´m sure they won´t. :(