Problem is, Hoki, the Wolkenritter, in the series, retreated before they could do any lasting damage to Nanoha due to the Barrier being shattered as she was being drained.
Here, they had no reason to stop, at all.
Yes, we know it was because they didn't want to stain Hayate's hands with blood, but they had no reason to stop draining Nanoha, Fate or Arf in the movie, especially considering that Nanoha is a lot weaker in the movie than she is in the series. Seeing as the Wolkenritter drained all three right away, if you watched the movie without knowing about the series or the Wolkenritter's past, you would wonder why they would let Nanoha, Fate and Arf go (and why the HELL was Arf and Fate able to recover so fucking fast from being drained?!) like they did. We don't find out until about half way through the movie, but, still, again, in the series, it made more sense, since, well, they left before draining Nanoha too far, THEN we learn that they didn't want to hurt anyone permanently. Plus the cartridge system is WAAAAY too over-powered in the movie compared to the series. Case in point, Yuuno, Zafira, Shamal, Caro, Lutecia, Rio, Corona, Einhart, Vivio all do pretty neat stuff without the cartridge system in place, and even Subaru, Teana and Erio, with Cartridges, couldn't match Nanoha and Fate at 9 years old without them in the series. In the movies, the cartridge system was just... WAAAAY too powered up. Plus, Fate losing her cool? Whut? I'm sorry, Fate's that girl who keeps her head about her at almost all times, not that screaming emo brat I saw on the screen.
And, establishing character moments is the problem in the movies.
Nanoha still lacks one, and the thing is, we KNOW that Yuuno and Arf get shuttered away after A's, as does Lindy and Chrono, this was the last chance any of those four had to do anything and the movie basically craps on them hard.
Nanoha still has no backstory, no motivation, no nothing to show me why she's the way she is in the movie.
So, when Nanoha, who has shown me no reason to think that she's capable of doing anything like she did in the series, is fighting Reinforce one-on-one, everything she does doesn't make me think that she's more capable or powerful than she was in canon at that point, it just comes across as an asspull.