[Akiyoshi]

I think they do this for two reasons:

- because of time sonstraints and...
- to nod at the more "mecha-aspects" of the series

During S1 and A's we were fooled into thinking Nanoha and Co. were all powerfull mages/knights destined to fight for the world's sake, came StrikerS and we found that they're tons of people like them and they aren't those destined warriors but instead a task force regulated by an institution focused on resolving "incidents" and we are also explained about the limits of magic the function of the devices and the dangers of trying to do the awesome things we watched in S1 and A's xDU(which is a quite jarring excuse to don't let the characters be so hot blooded again in order to allow the newcomers a chance to shine xDU). The MOVIE 1st give a more complete glimpse at what realy is behind Mid-Childas Magitech so it's natural that Rasising Heart came up less mystical and more techy in the movie(kudos to Nanoha for still being able to pull off her awesome hot blood stuff with her equally awesome high energy attitude xD).

MOVIE 1st have it's little details but i still find it very entertaining and the characters end up well played, hope MOVIE 2nd have the same quality.