Excellent addition to the overall Lancer universe. Despite it being an unofficial/third-party project, I think it'll rapidly become sort of a "It's not technically canon, but... you know, if you haven't read it you're not really playing the same game as everyone else." kind of thing.
The writing is excellent, and it's beautifully packaged. If I didn't know it wasn't an official product I never would have guessed it wasn't. Wonderful use of art and illustration.
The mechanical additions seem fine, but it's hard to tell without rigorous play testing. At a glance, nothing seems absurd, so I would guess that this could be integrated into any ongoing game with little worry about unbalanced abilities causing havoc.