Played a solo game to test out some of the new Vengeance heroes. K.N.Y.F.E. felt like a major disappointment. She's got some cool cards in her deck that can make for some pretty powerful combos, but a Overdo It felt completely out of place. Overdo It sucks for two reasons:
First, in most cases you will play the card during your own play phase, which means you have to take damage at the end of that turn before you can benefit from that card whatsoever (assuming the card is not destroyed before it gets back to your turn). Rarely another hero will allow you to play a card out of turn, but this seems like quite a hassle just to get decent value out of the card. Both Tachyon's Pushing the Limits and Ra's Solar Flare at least allow you to benefit from the card before choosing whether or not to destroy it. I am considering house ruling a swap on Overdo It allowing you to play a card at the end of your turn and take damage/destroy at the start of your turn.
Second, even if I house rule that swap, the effect is still not very good because K.N.Y.F.E. has virtually no mechanisms for filling her hand. Almost every other card in her deck allowing her to draw also allows her to play the same number of cards. The only exception is her "Overcharged Null Shield" (2 copies in deck) which allows you to draw two cards but only as a secondary effect of destroying the shield. The only way she'll ever have more than 3 or 4 cards in her hand is if another hero gives her card draw. Without having a big hand I see no reason to play "Overdo It" because I need to have it out for at least two turns to even recoup the play action used to play it. The chance of having four cards (my entire hand) to play that I can get maximum value out of is pretty small. In the rare case that I do pull it off (perhaps with the help of another hero), I certainly wouldn't expect to do it again after I've emptied my hand, so what I'm going to do with the other two copies of Overdo It in the deck I do not know. Having two of them in my hand of 3-4 cards made for boring play. I think K.N.Y.F.E. would be a stronger hero if I simply removed these cards from her deck because they don't work with the rest of it.