Wow, lots of original content
Spoiler:
Especially the inclusion of West Wind Brigade members.
They have their own manga series, it's nice to see them animated and speaking!
Slash & his PK gang are anime original, and they're doing a great job as side-characters too.
And even a surprise appearance of Rudie at the end.
A lot of explanations and foreshadowing that weren't in the novels or the manga added as well, perhaps to make things more clear for the younger audiences.
Oh, and
