Library can skip unwanted actions, but Scholar can refresh your hand after choking on stop cards. Both are very much hurt by being terminal, which library mitigates a bit better when you have treasures.
I think Research can go down a bit here. Flag bearer can probably boost up.
Hideout is like Shanty Town: an excellent secondary village. Your deck falls apart if you need them as your main source of actions, but it helps your deck run silky smooth if you have actions from elsewhere, and early game you might get lucky enough to take advantage of the +2 actions.
Silk Merchant is so high because you are really off to the races when you open it. Even a Silk Merchant / Silver opening still guarantees $5 even if you bottomdeck the merchant and Silver. But, you can open anything with Silk Merchant that you can afford and know that during the second shuffle you have a villager to manage their collision. It's a bit awkward when you buy multiple Silk Merchants, but they become super good again if you can trash them out of your deck while getting that extra coffer/villager bonus. And it gives +buy, which sometimes you need. It might feel unfair that it is so high due to its power coming from being an on-gain deal you can't resist, but the card synergizes fairly well with the coffers and villagers it gives you.