What's not immediately obvious is that this card doesn't give you an "extra" card. You had to draw it and play it to get that card, so it only pays for itself. For that reason, it's not good for characters with a small hand size, because on the turn you draw it your hand has even fewer options. If your normal hand size is 4, you're essentially getting a 3-card hand followed by a 5-card hand.
Characters benefit from this card if they want a big turn to "go nova." Characters that can pump themselves up and untap, like Quicksilver and Spider-Woman can use the bigger hand size to pump themselves up and untap in the same turn, multiplying the advantage of the cards in their hand. During the turn after playing Assess the Situation the advantage needs to be greater than what is lost by playing the card in the first place.