A nice conclusion to the Ryza trilogy, taking most of what was built up prior and wrapping it all up with a neat bow.
The alchemy and battle systems are mostly the same as in 2, just with the addition of the Key Modification, a new mechanic that only adds to these systems. The new characters and returning cast all have great interactions with one another.
The open-world aspect did worry me beforehand, but it's handled in a way where there's always something to see/do.

Most shops/treasure chests feel drastically reduced in usefulness, which didn't bother me personally, as I much preferred making materials/equipment myself.

Overall, a very good game, do recommend.