I try to go back to running players and NPCs using similar mechanics.
If you're a player, and you land this cool Aspect using a Maneuver (Disarmed! Woo, the giant Troll is Disarmed!) and it makes sense for you to expect to be able to Invoke for Effect to give the Aspect more than just a +2 to something, without having to spend a Fate Point for it, then an NPC should be able to do the same.
Likewise, if an NPC uses an Invoke for Effect on an Aspect landed on a player, and that player feels like it's more than just a momentary disadvantage, that it is a Compel meriting a Fate point, then perforce, any similar actions by a player against an NPC should be resolved similarly.
If the player wants it easier for the player, then that is a different negotiating stance.