As much as I enjoy older Nanoha/Fate doujins in which Vivio is involved, I don't think a doujin (or any plot, really) revolving around a young Nanoha and Fate could ever be beaten in terms of simplicity. There aren't any add-on characters yet, there isn't any over-complicated technology yet, and there aren't any limits holding them back yet. Yet.
As children, they could...reach farther, I suppose, and had a lot more freedom to do whatever they wanted with their time.
In short, I...really like the less mangled plot of the original Nanoha compared to the giant messes they have to put up with in the sequels. Reading this doujin really made my feelings hit home.
