Finished! An excellent series and I have so many thoughts on furies!
Reading the last book answered many of the questions I had, for example, Canea wouldn't have a great fury like Alera. It might have great furies but not one like Alera. My final impression is that the series overall was great. I think the unique uses of furycraft peaked at the Elinarch; either in Cursor's Fury or Captain's Fury, the two sorta blended together for me. Nothing in the series made me more excited than the sun magnification used at the Elinarch.
Persistently throughout the series I wondered why Romanic technology existed in the past and furycraft wasn't integrated with it from its inception. There's some statements that the world would change forever after the use of catapults against the Vord, but I can't imagine this historically genocidal society had siege weapons first, then later developed furycraft, then ignored the advantage of combining the two.
Anyway, strong opinions about weak things. Looking for a new series to read and could always use suggestions! As always, I'm looking for well defined, "hard" magic systems, hopefully with creative uses and Codex Alera was a little soft and fuzzy around the edges for me, would love to hear what anyone's got.