Spoilers.
I still think she was wrong, but it was in character, she doesn't see the bigger picture, the wars come and go and you can't trade in that strategic asset for an isolated flash point, Saul was right. But that's what made it work and feel right, she is flawed and flies off the handle, but will ultimately try and do things for the right reasons.
I thought they did it very well, the end scenes were under-stated and nicely done.
Funnily enough I'd also have been OK with a finish that saw her kill Saul and go bad. She has always been on the verge of it anyway, and it would have been a nice mirroring of the original season with Brodie.
But it was very well done, and for a long running show to finish so well it was great!