I am looking forward to Euphie realizing that she has just graduated from being a pawn to being a player. It's like that old joke, "Take out credit, buy a tank. - And what if they send debt collectors? - Who cares? You have a tank." Anise has just basically handed a tank to Euphie and said, you are free to do whatever you want. Euphie is caught up in her own mind's prison at the moment, but the "squirming inside" she feels is basically her dissatisfaction with her old life bubbling its way to the surface, and will hopefully transform into desire for change.
Anise might actually end up building a tank at some point in the series, seeing as she must've learned about them in her previous life. Still, despite the 'Revolution' in the title, I don't think this series is gonna gun for a massive, dramatic war to overthrow the nobility and reform the kingdom like in I Favor the Villainess. I could see Anise's inventions kicking up a stir and uprooting the status quo by mass-producing and increasing access to magical power, removing noble monopolies on magical knowledge and equipment, which in turn would make them strive to seize Anise's innovations instead of letting the benefits filter down to the public.
The series is pretty strongly setting up Euphie as the next ruler, so she might just engineer a coup with a Anise's help and become an 'ideal' ruler who wins the trust of the people and gradually democratizes the administration. Alternatively, I could also see Euphie deposing the corrupt old nobility and then handing power over to prominent figures among the public instead of taking the reins herself. This would represent how far she's come from her roots, having found something far more valuable and fulfilling with Anise than she ever would on the throne, and not wanting to give it up to continue in a taxing, punishing hereditary position when she could just chill with her wife in the countryside or help the masses at street-level and on a person-to-person basis.
One interesting direction the series could take is by setting Anise and Euphie up as enemies based on their differing ideas of 'ideal' rule- Anise grows inspired to shake things up and liberate the country, while Euphie grows hesitant and is unwilling to betray her noble roots. I'm only suggesting this because I love angsty stories where lovers are torn apart by differing ideals, though it wouldn't be too strange for a girl with 21st century ideas of democracy to clash with a thoroughbred noble. Chances are that they'll work out any disputes over the course of a couple of chapters, and simply defeat someone important in the royal palace instead of plunging the nation into war (female-centred isekai stories tend to put a lot of stock in the value of manoeuvring and individual confrontation over mass-level conflict). In that sense, while the endgame will almost certainly be a 'Revolution', it'll likely be a much more intimate, personal one that alters the ways in which our leads perceive themselves, each other and the world as opposed to a drawn-out military conflict (much like Utena, which is always a good example to follow).