Additional weapons are cool and provide fun options. The difference in this vs arms law, is that the arms law combat tables are more realistic. Against full plate, a 2H sword ends up doing Krush criticals, where in The Armory, all criticals for a given weapon are always a specific type, but weapons that have the possibility of doing other critical types may choose to do so at a set penalty.
This loses the randomness of combat a bit, and this makes me a bit disappointed in the book as I liked the core mechanics much more. I liked the realism in all slashing weapons turning into bludgeoning criticals against full plate, since that's kind of what ended up happening in real life.
This book is a step back, I recommend that you get Arms Law instead. It probably wouldn't be too difficult to change these crit tables to be like a similar weapon from arms law.