3 cards at the start of a turn is way more useful than needing to play the equivalent of 3 labs (or village-smithy-lab) to net the same +3. Don't underestimate Monkey, the first to play 2 every turn (4 monkeys in deck) most often wins against 1 or 0 monkeys per turn since even if their deck is otherwise better it's hard for them to outpace without simply helping the one with 2 monkeys in play.
Sea Chart is certainly far more useful than Vagrant, closer to being like a Wishing Well that does (multi-)guessing for you. Patrician can eventually become better especially if you're kicking off turns with plays and there's not much else going on, but this requires a thin, high-cost deck which takes awhile to get and there's only 5 to go around. There's nothing to make it want to be more than a 2 cost, people would mostly ignore it much of the game, seldom reaching Emporium.