Both are pretty decent. They are no where near "effectively mandatory" the way that an Ascension tree or Supremecy is, but they also aren't Subterfuge which is a big deal. In general, I might rank them slightly lower than some of the other trees, and it's hard to justify them with the increasing competition for tradition tree slots, but they don't strike me as useless and I would say you might take them when you are trying to "max out" certain bonuses.
Aptitude strikes me as slightly better than Statescraft. -2% empire size per governor is easily a -10% empire size for a standard lineup of leaders, and +1 leader starting trait is exactly as good as it sounds, though it doesn't apply retroactively sadely. Most of the other bonuses I have yet to determine how strong/weak they are.
Statescraft has a lot of bonuses that....aren't super impressive, but it also has some good ones. Flat Edict Fund is the worst modifier in the game bar none, and the ones that affect agendas do way too little to be noticable. Councilor XP is just weaker Leader XP, and 300 XP every 10 years when most levels require thousands of XP is awful. However, "Effective Councillor Skill" is a really good modifier. It is basically an instant level up that applies only to the councilor bonuses, AND can go over the level limit of ten! Some councilor skill effects can get pretty strong the more levels you have. Second, the agendas it unlocks are also really good. Rightful Claims is a whopping -20% claim cost alongside a casual 50% bonus influence from rivals and a 5% damage buff against rivals. Oppose the Fallen is a 25% damage buff against Fallen/Awakened Empires and Marauders/Great Khan, an excellent option to have for the right situation in addition to the more universally useful Rightful Claims agenda.
