I felt this was a decent filler episode. I liked how it mentioned the war and how many people it affected. The rest of it was pretty comical and Armstrong is definitely a cool character to keep around.
"We will now run with the dashing method that has been passed down."
Armstrong is definitely cool. He kind of reminds me of haggar from final fight except with a blonde mustache and nearly no hair on top. His poses are the best, but it's not only that. I cracked up when he drew that picture of Al posing when him and Edward were trying to find him. That's some talent right there!
I'm thinking he'll be around for a while, since he's in the theme song and all.
This is only partially a spoiler, but i put tags around it anyway.
Spoiler:
Just because they are in the theme song doesnt mean they will remain alive. There are a couple characters in the songs that are not alive. I will not name who...