MC's daily life, one of the major elements missing from the EXCEEDS Gun Blaze Vengeance anime.
The story never slow down.
In 12 episodes, it was almost entirely plot progression.
there was no time to get attached to the characters.
This is glaringly obvious when comparing it to Nanoha A's, which has only 1 more episode but took the time to develop the bond between the Wolkenritters and Hayate.
Seriously, Admiral Graham received more development in A's than the entire Demon Hunter squad in Gun Blaze Vengeance.
The other point, of course, is that Nanoha has been sidelined far too much for a series that bears her name.
Even in StrikerS, she had a much more significant presence.