Difficulty is customizable, perks and talents are not (at least their effects aren't unless you have a PC).
To be more descriptive, I wouldn't really want Bethesda to remove a feature like this because they think it would result in characters becoming too powerful when the person who's playing the game is the one who's in control of whether or not they become powerful or impose limits on themselves in an effort to keep the game challenging.
I have faith that Bethesda knows how to balance it all out in the end, and still keep the game fun.