
While usually Arkham Horror LCG is pretty good at avoiding power creep overall, or keep it at a minimum, this card has been hit full strenght by it: you cannot really justify using this in place of Deep Knowledge, when that cards costs zero and can also allow others investigators at your location to "take" your draws to draw cards from their deck instead, making that card even more versatile than Preposterous Sketches. And it doesn't even need for your location to have a clue, mind you!
This card is completely worthless if you have Innsmouth Cospiracy in your collection: about the only investigator who would run this in place of Deep Knowledge is Joe Diamond, who can reduce the cost to 0 by putting it in his hunch deck and play it without adding curses as long as he is somewhere with a clue
Even the upgrade isn't worth it, for 2 exp you reduce the cost of the card to zero: that is it. No extra skill icon, no removal of the clue clause, no extra effect: nothing. The fact you do not add curses is not worth the sheer versatility of allowing other investigators to draw, unless you are playing solo
About the only reason why I see anyone taking Preposterous Sketches over Deep Knowledge is because your team generates so many curses, you are not likely to be able to play this consistently (as you need to have 2 "free spaces" to put two curses in the Chaos Bag to pay the cost of playing the card, if you have 9 or 10 in the game you cannot play Deep Knowledge), which is honestly fairly unlikely even if you have a 4 members party all using curse-adding cards, as the high number of players means the curses will get flushed out at a quicker pace too.
So yeah, dead card: shame