I really like this card. I view it as a "buy one preposterous sketches, get one free". While 5 is not double 3, you should take into account the fact that in each case you are spending 1 card to do this. Better yet, you can share those cards with your team. The cost savings is great since you'll probably want to be playing all those cards you just drew.

Thorough Inquiry: 2r, 2a -> net +4 cards

Preposterous Sketches: 2r, 1a -> net +2 cards

~ ~ ~ ~ ~

There are other draw events that save you resources but they either cost XP or add curses:

Deep Knowledge: 0r, 1a -> net +2 cards + 2 curses

Cryptic Research: 0r, 0a, 4xp -> net +2 cards

Preposterous Sketches: 0r, 1a, 2xp -> net +2 cards