One drops without powerful abilities or two power just aren't playable in limited unless your deck is hyper aggressive or as a SB card against those decks. Scrivener's ability does nothing for hyper aggressive decks so it is pretty useless in those. One drops simply don't have enough of an effect on the game to be worth including in your deck. The 1/1 body has little effect on the board quickly becoming out classed and therefore unable to attack or block. Gaining maybe five life simply isn't worth a card and even that is assuming you drew on by turn one.
Pack raptor is also probably unplayable with its effect not having enough of an effect on the average game. It again is useless past turn one and replies on you drawing multiple raptors you shuffled in before it becomes good. An event which is much rarer than never drawing one and being stuck with a useless 1/1.