As a Storyteller, you’d generally want to facilitate open-ended abilities as the players with those powers would like them used, or else in a predictable manner. If you’re the Courtier and you drink with an ongoing town role because you distrust their slot, why shouldn’t the ST make those effects just distinguishable enough to signal they’re drunk?
On the other hand, roles like Philosopher / Innkeeper / Gossip have benefits and drawbacks, and those drawbacks usually aren’t helpful if you’re going for maximum power.