I definately like Felicity's Drawing. By ditching 1 or 2 cards in your hand, you can draw 3 to 4 cards respectively. In terms of draw, the only way you'll get better results is with either Steven's Advice (max 6. will be rotated next season), Copycat (dependent on your opponent's hand, could be rotated), TG's Wager (might also backfire and get 3), or Professor Birch (up to 5, dependent on hand). So actually, considering the limited restrictions on Felicity's Drawing (must have 1 or 2 cards to use obviously), it is a powerful source of draw. It's only real flaw, if anything, is that with stuff like Absol running around, you might not have as many cards to ditch to use Felicity's Drawing.
Modified - 9/10 (One of the best draw cards out there, will be the best for the foreseeable future next season)
Limited - 10/10 (Always helpful to have a source of draw, make sure you trade for some more afterwards)
Unlimited - 2/10 (Could be useful I think).