I would:
- make Deidara use C0 at least once as an Edo, or at least have him do more damage;
- let Danzo rule Konoha for a while, temporary turning it into a dystopia so that good guys have to fight the system;
- show what's outside of the known NV, or at least hint at it some more;
- have more meaningful fights in a war, without pointless Edos who just were there like Gari and Pakura;
That's all I can think of now :| I'm sure I can come up with more though.
- make Deidara use C0 at least once as an Edo, or at least have him do more damage;
- let Danzo rule Konoha for a while, temporary turning it into a dystopia so that good guys have to fight the system;
- show what's outside of the known NV, or at least hint at it some more;
- have more meaningful fights in a war, without pointless Edos who just were there like Gari and Pakura;
That's all I can think of now :| I'm sure I can come up with more though.