Part 1: Miscuts General rule of thumb: If it doesnt show a 2nd card, its NOT a miscut
There are so many good reprints in this set, and Im sure Im leaving off a few favorites
Polluted Cistern // Dim Oubliette Polluted Cistern // Dim Oubliette is very interesting in graveyard-centric decks
Especially as an until-end-of-turn flicker does largely the same thing, save for losing any auras or counters on your bodies
I've kind of already answered question 2
Wizards pulled this off perfectly, giving us 900, 700, and 300 serialized versions of the same card (again with different art, and with the non-serialized, nonfoils still a difficult pull) they gave us the first 1 of 1 card in Magics history, opened by a player in Canada and famously sold to Post Malone for $2 million