This one is VERY interesting...
A little on the wordy side, but definitely not something I would consider boring. I know the Villainess tag has been overused to absolute hell but trust me when I say that this is far from trash.
I would say that the best thing about the manga is it's world-building and story. The progression feels very natural, and it doesn't feel like any setting or character is shoehorned in just because they need to exist for the plot. Everything flows so smoothly to the point that I didn't even realize I was reading tens of pages per chapter.
The main problem I would have with this is the magic and the action scenes, specifically the fight with the Grand Duke. Basically nothing is explained about it, as far as I know. We don't know how it functions, we don't know how magic is strengthened or improved, we don't really see anyone using magic until that point, we don't see anything related to it. The only we've actually seen until that point is the body-swapping. How am I supposed to be excited for the fight with the Duke if I don't even know what the fuck is even happening? All I remember is that the Duke got hit with a bind spell. Probably the most lackluster scene in this.
I would recommend it. It is unique in its own way and it's enjoyable to read at least. A little wordy if that's a problem.