I feel like the wrong decisions were made in this expansion.
It's supposed to be an immersion pack, something focused on Britain. They could have reworked parliaments. Added a clans estate for Celtic culture. Added highlander infantry. Instead they chose to add mechanics like innovativeness, which is implemented poorly and a huge wasted opportunity.
All innovativeness does is decrease power costs and military tradition decay (which I don't really understand, how does being innovative equate to preserving military tradition?). However these bonuses are rather meager, especially when you compare them to the work you have to do to reach 100 in the first place.
Being innovative leads to inventions. Creations. What they could have done was introduce inventions into the game, like in Victoria 2, where unlocking a technology would give you the chance of discovering certain inventions that would give small bonuses to your nation. Innovativeness could have been a modifier to increase the chances of discovering inventions. The higher innovation you have, the higher base chance of inventing something.
https://vic2.paradoxwikis.com/Inventions
Of course, this wouldn't happen. Being an immersion pack, a mechanic that would rework the game would no way be included. They took an idea that could have been expanded upon even more and put into a full fledged DLC and put it as a small worthless modifier in an immersion pack instead. Reworking parliaments or estates specific to Britain would have been a much better and less wasteful idea.