Scout+ is as much of a conditional Lab as Vagrant is. Sure, Scout+ is stronger because it can potentially draw more than 1 card, but that card is not going to be very useful for your hand (edge cases like Great Hall aside), it just improves your next hand. It's also weaker than Cartographer, because it really doesn't matter at all if your green is in your hand or in your discard pile (again, edge cases aside), but Carto at least gets to discard Coppers and other unwanted cards as well. Anyway, Vagrant and Cartographer aren't power cards, and Scout+ is somewhere in between them both cost-wise and power-wise, so I'm fairly sure Scout+ wasn't going to be overpowered.
Then again, to be honest this discussion is likely moot because I don't think Scout+ is going to be in the new Intrigue.